diff --git a/src/bootstrap/compile.rs b/src/bootstrap/compile.rs
index 872c29085289a1bcfbe17c9a9bda8f31510717ac..da57881202d17af8b09a92210d2edb3eb1c82ef5 100644
--- a/src/bootstrap/compile.rs
+++ b/src/bootstrap/compile.rs
@@ -77,7 +77,7 @@ fn run(self, builder: &Builder) {
                 compiler: from,
                 target,
             });
-            println!("Uplifting stage1 std ({} -> {})", from.host, target);
+            builder.info(&format!("Uplifting stage1 std ({} -> {})", from.host, target));
 
             // Even if we're not building std this stage, the new sysroot must
             // still contain the musl startup objects.
@@ -105,8 +105,8 @@ fn run(self, builder: &Builder) {
         std_cargo(builder, &compiler, target, &mut cargo);
 
         let _folder = build.fold_output(|| format!("stage{}-std", compiler.stage));
-        println!("Building stage{} std artifacts ({} -> {})", compiler.stage,
-                &compiler.host, target);
+        build.info(&format!("Building stage{} std artifacts ({} -> {})", compiler.stage,
+                &compiler.host, target));
         run_cargo(build,
                   &mut cargo,
                   &libstd_stamp(build, compiler, target),
@@ -213,12 +213,12 @@ fn run(self, builder: &Builder) {
         let compiler = self.compiler;
         let target_compiler = self.target_compiler;
         let target = self.target;
-        println!("Copying stage{} std from stage{} ({} -> {} / {})",
+        build.info(&format!("Copying stage{} std from stage{} ({} -> {} / {})",
                 target_compiler.stage,
                 compiler.stage,
                 &compiler.host,
                 target_compiler.host,
-                target);
+                target));
         let libdir = builder.sysroot_libdir(target_compiler, target);
         add_to_sysroot(&build, &libdir, &libstd_stamp(build, compiler, target));
 
@@ -352,7 +352,7 @@ fn run(self, builder: &Builder) {
                 compiler: builder.compiler(1, build.build),
                 target,
             });
-            println!("Uplifting stage1 test ({} -> {})", &build.build, target);
+            build.info(&format!("Uplifting stage1 test ({} -> {})", &build.build, target));
             builder.ensure(TestLink {
                 compiler: builder.compiler(1, build.build),
                 target_compiler: compiler,
@@ -367,8 +367,8 @@ fn run(self, builder: &Builder) {
         test_cargo(build, &compiler, target, &mut cargo);
 
         let _folder = build.fold_output(|| format!("stage{}-test", compiler.stage));
-        println!("Building stage{} test artifacts ({} -> {})", compiler.stage,
-                &compiler.host, target);
+        build.info(&format!("Building stage{} test artifacts ({} -> {})", compiler.stage,
+                &compiler.host, target));
         run_cargo(build,
                   &mut cargo,
                   &libtest_stamp(build, compiler, target),
@@ -414,12 +414,12 @@ fn run(self, builder: &Builder) {
         let compiler = self.compiler;
         let target_compiler = self.target_compiler;
         let target = self.target;
-        println!("Copying stage{} test from stage{} ({} -> {} / {})",
+        build.info(&format!("Copying stage{} test from stage{} ({} -> {} / {})",
                 target_compiler.stage,
                 compiler.stage,
                 &compiler.host,
                 target_compiler.host,
-                target);
+                target));
         add_to_sysroot(&build, &builder.sysroot_libdir(target_compiler, target),
                     &libtest_stamp(build, compiler, target));
         builder.ensure(tool::CleanTools {
@@ -469,7 +469,7 @@ fn run(self, builder: &Builder) {
                 compiler: builder.compiler(1, build.build),
                 target,
             });
-            println!("Uplifting stage1 rustc ({} -> {})", &build.build, target);
+            build.info(&format!("Uplifting stage1 rustc ({} -> {})", &build.build, target));
             builder.ensure(RustcLink {
                 compiler: builder.compiler(1, build.build),
                 target_compiler: compiler,
@@ -491,8 +491,8 @@ fn run(self, builder: &Builder) {
         rustc_cargo(build, &mut cargo);
 
         let _folder = build.fold_output(|| format!("stage{}-rustc", compiler.stage));
-        println!("Building stage{} compiler artifacts ({} -> {})",
-                 compiler.stage, &compiler.host, target);
+        build.info(&format!("Building stage{} compiler artifacts ({} -> {})",
+                 compiler.stage, &compiler.host, target));
         run_cargo(build,
                   &mut cargo,
                   &librustc_stamp(build, compiler, target),
@@ -569,12 +569,12 @@ fn run(self, builder: &Builder) {
         let compiler = self.compiler;
         let target_compiler = self.target_compiler;
         let target = self.target;
-        println!("Copying stage{} rustc from stage{} ({} -> {} / {})",
+        build.info(&format!("Copying stage{} rustc from stage{} ({} -> {} / {})",
                  target_compiler.stage,
                  compiler.stage,
                  &compiler.host,
                  target_compiler.host,
-                 target);
+                 target));
         add_to_sysroot(&build, &builder.sysroot_libdir(target_compiler, target),
                        &librustc_stamp(build, compiler, target));
         builder.ensure(tool::CleanTools {
@@ -648,8 +648,8 @@ fn run(self, builder: &Builder) {
                     features.push_str(" emscripten");
                 }
 
-                println!("Building stage{} codegen artifacts ({} -> {}, {})",
-                         compiler.stage, &compiler.host, target, self.backend);
+                build.info(&format!("Building stage{} codegen artifacts ({} -> {}, {})",
+                         compiler.stage, &compiler.host, target, self.backend));
 
                 // Pass down configuration from the LLVM build into the build of
                 // librustc_llvm and librustc_trans.
@@ -933,7 +933,7 @@ fn run(self, builder: &Builder) -> Compiler {
 
         let stage = target_compiler.stage;
         let host = target_compiler.host;
-        println!("Assembling stage{} compiler ({})", stage, host);
+        build.info(&format!("Assembling stage{} compiler ({})", stage, host));
 
         // Link in all dylibs to the libdir
         let sysroot = builder.sysroot(target_compiler);
@@ -1186,7 +1186,7 @@ pub fn stream_cargo(
     // Make sure Cargo actually succeeded after we read all of its stdout.
     let status = t!(child.wait());
     if !status.success() {
-        println!("command did not execute successfully: {:?}\n\
+        eprintln!("command did not execute successfully: {:?}\n\
                   expected success, got: {}",
                  cargo,
                  status);
diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
index 86ef5c35cd7f419d5a00544ea2842d8bb4e5a24d..774f4e6e8bf2579cfe484bde6afa3a910fcd31da 100644
--- a/src/bootstrap/dist.rs
+++ b/src/bootstrap/dist.rs
@@ -89,9 +89,9 @@ fn run(self, builder: &Builder) -> PathBuf {
 
         let name = pkgname(build, "rust-docs");
 
-        println!("Dist docs ({})", host);
+        build.info(&format!("Dist docs ({})", host));
         if !build.config.docs {
-            println!("\tskipping - docs disabled");
+            build.info(&format!("\tskipping - docs disabled"));
             return distdir(build).join(format!("{}-{}.tar.gz", name, host));
         }
 
@@ -152,9 +152,9 @@ fn run(self, builder: &Builder) -> PathBuf {
 
         let name = pkgname(build, "rustc-docs");
 
-        println!("Dist compiler docs ({})", host);
+        build.info(&format!("Dist compiler docs ({})", host));
         if !build.config.compiler_docs {
-            println!("\tskipping - compiler docs disabled");
+            build.info(&format!("\tskipping - compiler docs disabled"));
             return distdir(build).join(format!("{}-{}.tar.gz", name, host));
         }
 
@@ -343,7 +343,7 @@ fn run(self, builder: &Builder) -> Option<PathBuf> {
             return None;
         }
 
-        println!("Dist mingw ({})", host);
+        build.info(&format!("Dist mingw ({})", host));
         let name = pkgname(build, "rust-mingw");
         let image = tmpdir(build).join(format!("{}-{}-image", name, host));
         let _ = fs::remove_dir_all(&image);
@@ -398,7 +398,7 @@ fn run(self, builder: &Builder) -> PathBuf {
         let compiler = self.compiler;
         let host = self.compiler.host;
 
-        println!("Dist rustc stage{} ({})", compiler.stage, compiler.host);
+        build.info(&format!("Dist rustc stage{} ({})", compiler.stage, compiler.host));
         let name = pkgname(build, "rustc");
         let image = tmpdir(build).join(format!("{}-{}-image", name, host));
         let _ = fs::remove_dir_all(&image);
@@ -627,12 +627,12 @@ fn run(self, builder: &Builder) -> PathBuf {
         let target = self.target;
 
         let name = pkgname(build, "rust-std");
-        println!("Dist std stage{} ({} -> {})", compiler.stage, &compiler.host, target);
+        build.info(&format!("Dist std stage{} ({} -> {})", compiler.stage, &compiler.host, target));
 
         // The only true set of target libraries came from the build triple, so
         // let's reduce redundant work by only producing archives from that host.
         if compiler.host != build.build {
-            println!("\tskipping, not a build host");
+            build.info(&format!("\tskipping, not a build host"));
             return distdir(build).join(format!("{}-{}.tar.gz", name, target));
         }
 
@@ -704,11 +704,11 @@ fn run(self, builder: &Builder) -> PathBuf {
         let compiler = self.compiler;
         let target = self.target;
         assert!(build.config.extended);
-        println!("Dist analysis");
+        build.info(&format!("Dist analysis"));
         let name = pkgname(build, "rust-analysis");
 
         if &compiler.host != build.build {
-            println!("\tskipping, not a build host");
+            build.info(&format!("\tskipping, not a build host"));
             return distdir(build).join(format!("{}-{}.tar.gz", name, target));
         }
 
@@ -730,7 +730,7 @@ fn run(self, builder: &Builder) -> PathBuf {
         let image_src = src.join("save-analysis");
         let dst = image.join("lib/rustlib").join(target).join("analysis");
         t!(fs::create_dir_all(&dst));
-        println!("image_src: {:?}, dst: {:?}", image_src, dst);
+        build.info(&format!("image_src: {:?}, dst: {:?}", image_src, dst));
         build.cp_r(&image_src, &dst);
 
         let mut cmd = rust_installer(builder);
@@ -813,7 +813,7 @@ fn make_run(run: RunConfig) {
     /// Creates the `rust-src` installer component
     fn run(self, builder: &Builder) -> PathBuf {
         let build = builder.build;
-        println!("Dist src");
+        build.info(&format!("Dist src"));
 
         let name = pkgname(build, "rust-src");
         let image = tmpdir(build).join(format!("{}-image", name));
@@ -908,7 +908,7 @@ fn make_run(run: RunConfig) {
     /// Creates the plain source tarball
     fn run(self, builder: &Builder) -> PathBuf {
         let build = builder.build;
-        println!("Create plain source tarball");
+        build.info(&format!("Create plain source tarball"));
 
         // Make sure that the root folder of tarball has the correct name
         let plain_name = format!("{}-src", pkgname(build, "rustc"));
@@ -985,7 +985,7 @@ fn run(self, builder: &Builder) -> PathBuf {
         if let Some(dir) = tarball.parent() {
             build.create_dir(&dir);
         }
-        println!("running installer");
+        build.info(&format!("running installer"));
         let mut cmd = rust_installer(builder);
         cmd.arg("tarball")
            .arg("--input").arg(&plain_name)
@@ -1042,7 +1042,7 @@ fn run(self, builder: &Builder) -> PathBuf {
         let stage = self.stage;
         let target = self.target;
 
-        println!("Dist cargo stage{} ({})", stage, target);
+        build.info(&format!("Dist cargo stage{} ({})", stage, target));
         let src = build.src.join("src/tools/cargo");
         let etc = src.join("src/etc");
         let release_num = build.release_num("cargo");
@@ -1130,7 +1130,7 @@ fn run(self, builder: &Builder) -> Option<PathBuf> {
         let target = self.target;
         assert!(build.config.extended);
 
-        println!("Dist RLS stage{} ({})", stage, target);
+        build.info(&format!("Dist RLS stage{} ({})", stage, target));
         let src = build.src.join("src/tools/rls");
         let release_num = build.release_num("rls");
         let name = pkgname(build, "rls");
@@ -1210,7 +1210,7 @@ fn run(self, builder: &Builder) -> Option<PathBuf> {
         let stage = self.stage;
         let target = self.target;
 
-        println!("Dist Rustfmt stage{} ({})", stage, target);
+        build.info(&format!("Dist Rustfmt stage{} ({})", stage, target));
         let src = build.src.join("src/tools/rustfmt");
         let release_num = build.release_num("rustfmt");
         let name = pkgname(build, "rustfmt");
@@ -1297,7 +1297,7 @@ fn run(self, builder: &Builder) {
         let stage = self.stage;
         let target = self.target;
 
-        println!("Dist extended stage{} ({})", stage, target);
+        build.info(&format!("Dist extended stage{} ({})", stage, target));
 
         let rustc_installer = builder.ensure(Rustc {
             compiler: builder.compiler(stage, target),
diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index eeea6f0d01d2acb3cffe8fdeb21b993f4e8b3bc5..f07c3e707574b4e4a051fc6e9b1f9e0950b82917 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -169,7 +169,7 @@ fn run(self, builder: &Builder) {
 
         let out = out.join(name);
 
-        println!("Cargo Book ({}) - {}", target, name);
+        build.info(&format!("Cargo Book ({}) - {}", target, name));
 
         let _ = fs::remove_dir_all(&out);
 
@@ -215,7 +215,7 @@ fn run(self, builder: &Builder) {
         if up_to_date(&src, &index) && up_to_date(&rustbook, &index) {
             return
         }
-        println!("Rustbook ({}) - {}", target, name);
+        build.info(&format!("Rustbook ({}) - {}", target, name));
         let _ = fs::remove_dir_all(&out);
         build.run(rustbook_cmd
                        .arg("build")
@@ -283,11 +283,11 @@ fn run(self, builder: &Builder) {
 
         // build the index page
         let index = format!("{}/index.md", name);
-        println!("Documenting book index ({})", target);
+        build.info(&format!("Documenting book index ({})", target));
         invoke_rustdoc(builder, compiler, target, &index);
 
         // build the redirect pages
-        println!("Documenting book redirect pages ({})", target);
+        build.info(&format!("Documenting book redirect pages ({})", target));
         for file in t!(fs::read_dir(build.src.join("src/doc/book/redirects"))) {
             let file = t!(file);
             let path = file.path();
@@ -360,7 +360,7 @@ fn run(self, builder: &Builder) {
         let build = builder.build;
         let target = self.target;
         let compiler = self.compiler;
-        println!("Documenting standalone ({})", target);
+        build.info(&format!("Documenting standalone ({})", target));
         let out = build.doc_out(target);
         t!(fs::create_dir_all(&out));
 
@@ -451,7 +451,7 @@ fn run(self, builder: &Builder) {
         let build = builder.build;
         let stage = self.stage;
         let target = self.target;
-        println!("Documenting stage{} std ({})", stage, target);
+        build.info(&format!("Documenting stage{} std ({})", stage, target));
         let out = build.doc_out(target);
         t!(fs::create_dir_all(&out));
         let compiler = builder.compiler(stage, build.build);
@@ -532,7 +532,7 @@ fn run(self, builder: &Builder) {
         let build = builder.build;
         let stage = self.stage;
         let target = self.target;
-        println!("Documenting stage{} test ({})", stage, target);
+        build.info(&format!("Documenting stage{} test ({})", stage, target));
         let out = build.doc_out(target);
         t!(fs::create_dir_all(&out));
         let compiler = builder.compiler(stage, build.build);
@@ -598,7 +598,7 @@ fn run(self, builder: &Builder) {
         let build = builder.build;
         let stage = self.stage;
         let target = self.target;
-        println!("Documenting stage{} whitelisted compiler ({})", stage, target);
+        build.info(&format!("Documenting stage{} whitelisted compiler ({})", stage, target));
         let out = build.doc_out(target);
         t!(fs::create_dir_all(&out));
         let compiler = builder.compiler(stage, build.build);
@@ -670,7 +670,7 @@ fn run(self, builder: &Builder) {
         let build = builder.build;
         let stage = self.stage;
         let target = self.target;
-        println!("Documenting stage{} compiler ({})", stage, target);
+        build.info(&format!("Documenting stage{} compiler ({})", stage, target));
         let out = build.compiler_doc_out(target);
         t!(fs::create_dir_all(&out));
         let compiler = builder.compiler(stage, build.build);
@@ -682,7 +682,7 @@ fn run(self, builder: &Builder) {
         };
 
         if !build.config.compiler_docs {
-            println!("\tskipping - compiler docs disabled");
+            build.info(&format!("\tskipping - compiler docs disabled"));
             return;
         }
 
@@ -761,7 +761,7 @@ fn run(self, builder: &Builder) {
         let build = builder.build;
         let target = self.target;
 
-        println!("Documenting error index ({})", target);
+        build.info(&format!("Documenting error index ({})", target));
         let out = build.doc_out(target);
         t!(fs::create_dir_all(&out));
         let mut index = builder.tool_cmd(Tool::ErrorIndex);
@@ -806,7 +806,7 @@ fn run(self, builder: &Builder) {
             target,
         });
 
-        println!("Generating unstable book md files ({})", target);
+        build.info(&format!("Generating unstable book md files ({})", target));
         let out = build.md_doc_out(target).join("unstable-book");
         build.create_dir(&out);
         build.remove_dir(&out);
diff --git a/src/bootstrap/install.rs b/src/bootstrap/install.rs
index 0d7c1b8de63234d728ed584cc0e15c646754c7d7..4b05cac1ce6979123e0637c5169c9dd2a4b9dff4 100644
--- a/src/bootstrap/install.rs
+++ b/src/bootstrap/install.rs
@@ -63,7 +63,7 @@ fn install_sh(
     host: Option<Interned<String>>
 ) {
     let build = builder.build;
-    println!("Install {} stage{} ({:?})", package, stage, host);
+    build.info(&format!("Install {} stage{} ({:?})", package, stage, host));
 
     let prefix_default = PathBuf::from("/usr/local");
     let sysconfdir_default = PathBuf::from("/etc");
@@ -212,7 +212,7 @@ fn run($sel, $builder: &Builder) {
             Self::should_install(builder) {
             install_rls(builder, self.stage, self.target);
         } else {
-            println!("skipping Install RLS stage{} ({})", self.stage, self.target);
+            builder.info(&format!("skipping Install RLS stage{} ({})", self.stage, self.target));
         }
     };
     Rustfmt, "rustfmt", Self::should_build(_config), only_hosts: true, {
@@ -220,7 +220,8 @@ fn run($sel, $builder: &Builder) {
             Self::should_install(builder) {
             install_rustfmt(builder, self.stage, self.target);
         } else {
-            println!("skipping Install Rustfmt stage{} ({})", self.stage, self.target);
+            builder.info(
+                &format!("skipping Install Rustfmt stage{} ({})", self.stage, self.target));
         }
     };
     Analysis, "analysis", Self::should_build(_config), only_hosts: false, {
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 7b37c9cefa5cb5e1220a27816672c6a7b4049712..c677d78d07b1fce6aabf235a6d83c766ae06c3e5 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -667,6 +667,11 @@ fn verbose(&self, msg: &str) {
         }
     }
 
+    fn info(&self, msg: &str) {
+        if self.config.dry_run { return; }
+        println!("{}", msg);
+    }
+
     /// Returns the number of parallel jobs that have been configured for this
     /// build.
     fn jobs(&self) -> u32 {
@@ -974,7 +979,7 @@ fn unstable_features(&self) -> bool {
     pub fn fold_output<D, F>(&self, name: F) -> Option<OutputFolder>
         where D: Into<String>, F: FnOnce() -> D
     {
-        if self.ci_env == CiEnv::Travis {
+        if !self.config.dry_run && self.ci_env == CiEnv::Travis {
             Some(OutputFolder::new(name().into()))
         } else {
             None
diff --git a/src/bootstrap/native.rs b/src/bootstrap/native.rs
index c49811d839a04dfdaf8c52ff68e7f2c2b384751d..c92d5c6f7ca497420163ed58a6a7fc375014112b 100644
--- a/src/bootstrap/native.rs
+++ b/src/bootstrap/native.rs
@@ -106,8 +106,8 @@ fn run(self, builder: &Builder) -> PathBuf {
 
         let _folder = build.fold_output(|| "llvm");
         let descriptor = if emscripten { "Emscripten " } else { "" };
-        println!("Building {}LLVM for {}", descriptor, target);
-        let _time = util::timeit();
+        build.info(&format!("Building {}LLVM for {}", descriptor, target));
+        let _time = util::timeit(&build);
         t!(fs::create_dir_all(&out_dir));
 
         // http://llvm.org/docs/CMake.html
@@ -359,8 +359,8 @@ fn run(self, builder: &Builder) -> PathBuf {
         }
 
         let _folder = build.fold_output(|| "lld");
-        println!("Building LLD for {}", target);
-        let _time = util::timeit();
+        build.info(&format!("Building LLD for {}", target));
+        let _time = util::timeit(&build);
         t!(fs::create_dir_all(&out_dir));
 
         let mut cfg = cmake::Config::new(build.src.join("src/tools/lld"));
@@ -409,7 +409,7 @@ fn run(self, builder: &Builder) {
         }
 
         let _folder = build.fold_output(|| "build_test_helpers");
-        println!("Building test helpers");
+        build.info(&format!("Building test helpers"));
         t!(fs::create_dir_all(&dst));
         let mut cfg = cc::Build::new();
 
@@ -605,11 +605,11 @@ fn run(self, builder: &Builder) {
             configure.arg("no-asm");
         }
         configure.current_dir(&obj);
-        println!("Configuring openssl for {}", target);
+        build.info(&format!("Configuring openssl for {}", target));
         build.run_quiet(&mut configure);
-        println!("Building openssl for {}", target);
+        build.info(&format!("Building openssl for {}", target));
         build.run_quiet(Command::new("make").arg("-j1").current_dir(&obj));
-        println!("Installing openssl for {}", target);
+        build.info(&format!("Installing openssl for {}", target));
         build.run_quiet(Command::new("make").arg("install").arg("-j1").current_dir(&obj));
 
         let mut f = t!(File::create(&stamp));
diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index 2fb84db4d897e15d4193e6db4033349d03b683ae..39740a83b0d0a804d267fa33eb7fbfc948a94e3c 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -109,11 +109,11 @@ fn run(self, builder: &Builder) {
         let build = builder.build;
         let host = self.host;
 
-        println!("Linkcheck ({})", host);
+        build.info(&format!("Linkcheck ({})", host));
 
         builder.default_doc(None);
 
-        let _time = util::timeit();
+        let _time = util::timeit(&build);
         try_run(build, builder.tool_cmd(Tool::Linkchecker)
                               .arg(build.out.join(host).join("doc")));
     }
@@ -164,7 +164,7 @@ fn run(self, builder: &Builder) {
         let out_dir = build.out.join("ct");
         t!(fs::create_dir_all(&out_dir));
 
-        let _time = util::timeit();
+        let _time = util::timeit(&build);
         let mut cmd = builder.tool_cmd(Tool::CargoTest);
         try_run(build, cmd.arg(&build.initial_cargo)
                           .arg(&out_dir)
@@ -509,7 +509,7 @@ fn run(self, builder: &Builder) {
             });
             builder.run(&mut command);
         } else {
-            println!("No nodejs found, skipping \"src/test/rustdoc-js\" tests");
+            builder.info(&format!("No nodejs found, skipping \"src/test/rustdoc-js\" tests"));
         }
     }
 }
@@ -541,7 +541,7 @@ fn run(self, builder: &Builder) {
         }
 
         let _folder = build.fold_output(|| "tidy");
-        println!("tidy check");
+        builder.info(&format!("tidy check"));
         try_run(build, &mut cmd);
     }
 
@@ -948,7 +948,8 @@ fn run(self, builder: &Builder) {
             }
         }
         if suite == "run-make-fulldeps" && !build.config.llvm_enabled {
-            println!("Ignoring run-make test suite as they generally don't work without LLVM");
+            builder.info(
+                &format!("Ignoring run-make test suite as they generally don't work without LLVM"));
             return;
         }
 
@@ -1002,9 +1003,9 @@ fn run(self, builder: &Builder) {
         build.ci_env.force_coloring_in_ci(&mut cmd);
 
         let _folder = build.fold_output(|| format!("test_{}", suite));
-        println!("Check compiletest suite={} mode={} ({} -> {})",
-                 suite, mode, &compiler.host, target);
-        let _time = util::timeit();
+        builder.info(&format!("Check compiletest suite={} mode={} ({} -> {})",
+                 suite, mode, &compiler.host, target));
+        let _time = util::timeit(&build);
         try_run(build, &mut cmd);
     }
 }
@@ -1039,7 +1040,7 @@ fn run(self, builder: &Builder) {
         // Do a breadth-first traversal of the `src/doc` directory and just run
         // tests for all files that end in `*.md`
         let mut stack = vec![build.src.join(self.path)];
-        let _time = util::timeit();
+        let _time = util::timeit(&build);
         let _folder = build.fold_output(|| format!("test_{}", self.name));
 
         let mut files = Vec::new();
@@ -1167,8 +1168,8 @@ fn run(self, builder: &Builder) {
 
 
         let _folder = build.fold_output(|| "test_error_index");
-        println!("Testing error-index stage{}", compiler.stage);
-        let _time = util::timeit();
+        build.info(&format!("Testing error-index stage{}", compiler.stage));
+        let _time = util::timeit(&build);
         build.run(&mut tool);
         markdown_test(builder, compiler, &output);
     }
@@ -1183,7 +1184,7 @@ fn markdown_test(builder: &Builder, compiler: Compiler, markdown: &Path) -> bool
         return true;
     }
 
-    println!("doc tests for: {}", markdown.display());
+    build.info(&format!("doc tests for: {}", markdown.display()));
     let mut cmd = builder.rustdoc_cmd(compiler.host);
     build.add_rust_test_threads(&mut cmd);
     cmd.arg("--test");
@@ -1453,8 +1454,8 @@ fn run(self, builder: &Builder) {
             // The javascript shim implements the syscall interface so that test
             // output can be correctly reported.
             if !build.config.wasm_syscall {
-                println!("Libstd was built without `wasm_syscall` feature enabled: \
-                          test output may not be visible.");
+                build.info(&format!("Libstd was built without `wasm_syscall` feature enabled: \
+                          test output may not be visible."));
             }
 
             // On the wasm32-unknown-unknown target we're using LTO which is
@@ -1476,9 +1477,9 @@ fn run(self, builder: &Builder) {
         let _folder = build.fold_output(|| {
             format!("{}_stage{}-{}", test_kind.subcommand(), compiler.stage, krate)
         });
-        println!("{} {} stage{} ({} -> {})", test_kind, krate, compiler.stage,
-                &compiler.host, target);
-        let _time = util::timeit();
+        build.info(&format!("{} {} stage{} ({} -> {})", test_kind, krate, compiler.stage,
+                &compiler.host, target));
+        let _time = util::timeit(&build);
         try_run(build, &mut cargo);
     }
 }
@@ -1543,9 +1544,9 @@ fn run(self, builder: &Builder) {
         let _folder = build.fold_output(|| {
             format!("{}_stage{}-rustdoc", test_kind.subcommand(), compiler.stage)
         });
-        println!("{} rustdoc stage{} ({} -> {})", test_kind, compiler.stage,
-                &compiler.host, target);
-        let _time = util::timeit();
+        build.info(&format!("{} rustdoc stage{} ({} -> {})", test_kind, compiler.stage,
+                &compiler.host, target));
+        let _time = util::timeit(&build);
 
         try_run(build, &mut cargo);
     }
@@ -1592,7 +1593,7 @@ fn run(self, builder: &Builder) {
 
         builder.ensure(compile::Test { compiler, target });
 
-        println!("REMOTE copy libs to emulator ({})", target);
+        build.info(&format!("REMOTE copy libs to emulator ({})", target));
         t!(fs::create_dir_all(build.out.join("tmp")));
 
         let server = builder.ensure(tool::RemoteTestServer { compiler, target });
@@ -1640,7 +1641,7 @@ fn make_run(run: RunConfig) {
     fn run(self, builder: &Builder) {
         let build = builder.build;
 
-        println!("Distcheck");
+        build.info(&format!("Distcheck"));
         let dir = build.out.join("tmp").join("distcheck");
         let _ = fs::remove_dir_all(&dir);
         t!(fs::create_dir_all(&dir));
@@ -1664,7 +1665,7 @@ fn run(self, builder: &Builder) {
                          .current_dir(&dir));
 
         // Now make sure that rust-src has all of libstd's dependencies
-        println!("Distcheck rust-src");
+        build.info(&format!("Distcheck rust-src"));
         let dir = build.out.join("tmp").join("distcheck-src");
         let _ = fs::remove_dir_all(&dir);
         t!(fs::create_dir_all(&dir));
diff --git a/src/bootstrap/tool.rs b/src/bootstrap/tool.rs
index 0b1616b9b4f90e419170e1ee98734b2d2cc9ff3e..93b6153fcb2f8c58c2758f3a6284e54e5867df83 100644
--- a/src/bootstrap/tool.rs
+++ b/src/bootstrap/tool.rs
@@ -116,7 +116,7 @@ fn run(self, builder: &Builder) -> Option<PathBuf> {
         cargo.arg("--features").arg(self.extra_features.join(" "));
 
         let _folder = build.fold_output(|| format!("stage{}-{}", compiler.stage, tool));
-        println!("Building stage{} tool {} ({})", compiler.stage, tool, target);
+        build.info(&format!("Building stage{} tool {} ({})", compiler.stage, tool, target));
         let mut duplicates = Vec::new();
         let is_expected = compile::stream_cargo(build, &mut cargo, &mut |msg| {
             // Only care about big things like the RLS/Cargo for now
@@ -427,7 +427,8 @@ fn run(self, builder: &Builder) -> PathBuf {
              .env("RUSTC_DEBUGINFO_LINES", builder.config.rust_debuginfo_lines.to_string());
 
         let _folder = build.fold_output(|| format!("stage{}-rustdoc", target_compiler.stage));
-        println!("Building rustdoc for stage{} ({})", target_compiler.stage, target_compiler.host);
+        build.info(&format!("Building rustdoc for stage{} ({})",
+            target_compiler.stage, target_compiler.host));
         build.run(&mut cargo);
 
         // Cargo adds a number of paths to the dylib search path on windows, which results in
diff --git a/src/bootstrap/util.rs b/src/bootstrap/util.rs
index 8a64b07496c96fd185fb956c09819866081780ce..f8c7032369890b8472a66083dee9ae9b467d6abe 100644
--- a/src/bootstrap/util.rs
+++ b/src/bootstrap/util.rs
@@ -22,6 +22,7 @@
 use std::time::{SystemTime, Instant};
 
 use config::Config;
+use Build;
 
 /// Returns the `name` as the filename of a static library for `target`.
 pub fn staticlib(name: &str, target: &str) -> String {
@@ -100,19 +101,21 @@ pub fn push_exe_path(mut buf: PathBuf, components: &[&str]) -> PathBuf {
     buf
 }
 
-pub struct TimeIt(Instant);
+pub struct TimeIt(bool, Instant);
 
 /// Returns an RAII structure that prints out how long it took to drop.
-pub fn timeit() -> TimeIt {
-    TimeIt(Instant::now())
+pub fn timeit(build: &Build) -> TimeIt {
+    TimeIt(build.config.dry_run, Instant::now())
 }
 
 impl Drop for TimeIt {
     fn drop(&mut self) {
-        let time = self.0.elapsed();
-        println!("\tfinished in {}.{:03}",
-                 time.as_secs(),
-                 time.subsec_nanos() / 1_000_000);
+        let time = self.1.elapsed();
+        if !self.0 {
+            println!("\tfinished in {}.{:03}",
+                    time.as_secs(),
+                    time.subsec_nanos() / 1_000_000);
+        }
     }
 }