diff --git a/src/Cargo.lock b/src/Cargo.lock
index 87903731f6612376cc33f54d850a23eb1115b94d..0ee46910f7d6ef3991f11b16aa97c6a38c1a15fb 100644
--- a/src/Cargo.lock
+++ b/src/Cargo.lock
@@ -1889,7 +1889,6 @@ name = "rustc_plugin"
 version = "0.0.0"
 dependencies = [
  "rustc 0.0.0",
- "rustc_back 0.0.0",
  "rustc_errors 0.0.0",
  "rustc_metadata 0.0.0",
  "syntax 0.0.0",
diff --git a/src/librustc_back/lib.rs b/src/librustc_back/lib.rs
index 5ed7b7f75bbfc70e7e42ee2c0721b92fc801e274..e338ee7bd932877b884d78d533e26f14028bd69a 100644
--- a/src/librustc_back/lib.rs
+++ b/src/librustc_back/lib.rs
@@ -28,10 +28,8 @@
 
 #![feature(box_syntax)]
 #![feature(const_fn)]
-#![feature(libc)]
 
 extern crate syntax;
-extern crate libc;
 extern crate rand;
 extern crate serialize;
 #[macro_use] extern crate log;
@@ -40,7 +38,6 @@
 
 pub mod tempdir;
 pub mod target;
-pub mod dynamic_lib;
 
 use std::str::FromStr;
 
diff --git a/src/librustc_metadata/creader.rs b/src/librustc_metadata/creader.rs
index 155097cdbe26c5e452e915afe17bef36c4cfde4d..e1c5cde42eccfd702acfd5028534ffed28dc44b3 100644
--- a/src/librustc_metadata/creader.rs
+++ b/src/librustc_metadata/creader.rs
@@ -556,7 +556,7 @@ fn load_derive_macros(&mut self, root: &CrateRoot, dylib: Option<PathBuf>, span:
         use std::{env, mem};
         use proc_macro::TokenStream;
         use proc_macro::__internal::Registry;
-        use rustc_back::dynamic_lib::DynamicLibrary;
+        use dynamic_lib::DynamicLibrary;
         use syntax_ext::deriving::custom::ProcMacroDerive;
         use syntax_ext::proc_macro_impl::{AttrProcMacro, BangProcMacro};
 
diff --git a/src/librustc_back/dynamic_lib.rs b/src/librustc_metadata/dynamic_lib.rs
similarity index 100%
rename from src/librustc_back/dynamic_lib.rs
rename to src/librustc_metadata/dynamic_lib.rs
diff --git a/src/librustc_metadata/lib.rs b/src/librustc_metadata/lib.rs
index 20bdfaea0d0bbf0b294b00c4a0c0de510831f7c3..6c1ca36232307f1c75443ae9a13b50863b533944 100644
--- a/src/librustc_metadata/lib.rs
+++ b/src/librustc_metadata/lib.rs
@@ -16,12 +16,14 @@
 #![feature(box_patterns)]
 #![feature(conservative_impl_trait)]
 #![feature(i128_type)]
+#![feature(libc)]
 #![feature(proc_macro_internals)]
 #![feature(quote)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(specialization)]
 #![feature(rustc_private)]
 
+extern crate libc;
 #[macro_use]
 extern crate log;
 #[macro_use]
@@ -54,6 +56,7 @@
 
 pub mod creader;
 pub mod cstore;
+pub mod dynamic_lib;
 pub mod locator;
 
 __build_diagnostic_array! { librustc_metadata, DIAGNOSTICS }
diff --git a/src/librustc_plugin/Cargo.toml b/src/librustc_plugin/Cargo.toml
index 7f41d0527617a4161634bcf55ef05edaff10b850..d8fa1da1ce219e1a3b66cf94c4043da5a98aac76 100644
--- a/src/librustc_plugin/Cargo.toml
+++ b/src/librustc_plugin/Cargo.toml
@@ -11,7 +11,6 @@ crate-type = ["dylib"]
 
 [dependencies]
 rustc = { path = "../librustc" }
-rustc_back = { path = "../librustc_back" }
 rustc_metadata = { path = "../librustc_metadata" }
 syntax = { path = "../libsyntax" }
 syntax_pos = { path = "../libsyntax_pos" }
diff --git a/src/librustc_plugin/lib.rs b/src/librustc_plugin/lib.rs
index a2a6d183e9ccc3d795980792c8bdc872ded6f31c..3df56c4e728ca6f29330100205a4632e95481a90 100644
--- a/src/librustc_plugin/lib.rs
+++ b/src/librustc_plugin/lib.rs
@@ -71,7 +71,6 @@
 #[macro_use] extern crate syntax;
 
 extern crate rustc;
-extern crate rustc_back;
 extern crate rustc_metadata;
 extern crate syntax_pos;
 extern crate rustc_errors as errors;
diff --git a/src/librustc_plugin/load.rs b/src/librustc_plugin/load.rs
index aba56788928af2c9c332f7c4824bd2c4f8810505..8a4ec03b20efcc74f14efa5b958ccb04dda050a2 100644
--- a/src/librustc_plugin/load.rs
+++ b/src/librustc_plugin/load.rs
@@ -115,7 +115,7 @@ fn dylink_registrar(&mut self,
                         span: Span,
                         path: PathBuf,
                         symbol: String) -> PluginRegistrarFun {
-        use rustc_back::dynamic_lib::DynamicLibrary;
+        use rustc_metadata::dynamic_lib::DynamicLibrary;
 
         // Make sure the path contains a / or the linker will search for it.
         let path = env::current_dir().unwrap().join(&path);
diff --git a/src/librustdoc/plugins.rs b/src/librustdoc/plugins.rs
index 4fc5159588d86f7512c4fb75fd77b403c0afbace..1a1e60a6945edd2fc26bb7e3c8a7fbe5292aec89 100644
--- a/src/librustdoc/plugins.rs
+++ b/src/librustdoc/plugins.rs
@@ -16,7 +16,7 @@
 use std::string::String;
 use std::path::PathBuf;
 
-use rustc_back::dynamic_lib as dl;
+use rustc_metadata::dynamic_lib as dl;
 
 pub type PluginResult = clean::Crate;
 pub type PluginCallback = fn (clean::Crate) -> PluginResult;
diff --git a/src/librustdoc/test.rs b/src/librustdoc/test.rs
index ee0d9a7f3e2d23cd9ea92458bdc0697f96281ffd..98369949c02a470aea0ebd40465f442fb3b6ecb3 100644
--- a/src/librustdoc/test.rs
+++ b/src/librustdoc/test.rs
@@ -27,7 +27,7 @@
 use rustc::session::{self, CompileIncomplete, config};
 use rustc::session::config::{OutputType, OutputTypes, Externs};
 use rustc::session::search_paths::{SearchPaths, PathKind};
-use rustc_back::dynamic_lib::DynamicLibrary;
+use rustc_metadata::dynamic_lib::DynamicLibrary;
 use rustc_back::tempdir::TempDir;
 use rustc_driver::{self, driver, Compilation};
 use rustc_driver::driver::phase_2_configure_and_expand;
diff --git a/src/test/run-make/extern-fn-reachable/main.rs b/src/test/run-make/extern-fn-reachable/main.rs
index a1bd1041d145eaa61e3090e4f79979770d0d5df5..27387332c1c1f50b0a7c4f5f8fbb3ff8eba44a3e 100644
--- a/src/test/run-make/extern-fn-reachable/main.rs
+++ b/src/test/run-make/extern-fn-reachable/main.rs
@@ -10,9 +10,9 @@
 
 #![feature(rustc_private)]
 
-extern crate rustc_back;
+extern crate rustc_metadata;
 
-use rustc_back::dynamic_lib::DynamicLibrary;
+use rustc_metadata::dynamic_lib::DynamicLibrary;
 use std::path::Path;
 
 pub fn main() {
diff --git a/src/test/run-pass-fulldeps/auxiliary/linkage-visibility.rs b/src/test/run-pass-fulldeps/auxiliary/linkage-visibility.rs
index 09a2e8ecd876d4c5d074873068896c944a57f75a..7a15a4cb3a2e8ee9d853e475c45287aae93692a4 100644
--- a/src/test/run-pass-fulldeps/auxiliary/linkage-visibility.rs
+++ b/src/test/run-pass-fulldeps/auxiliary/linkage-visibility.rs
@@ -14,9 +14,9 @@
 // do the runtime check that these functions aren't exported.
 #![allow(private_no_mangle_fns)]
 
-extern crate rustc_back;
+extern crate rustc_metadata;
 
-use rustc_back::dynamic_lib::DynamicLibrary;
+use rustc_metadata::dynamic_lib::DynamicLibrary;
 
 #[no_mangle]
 pub fn foo() { bar(); }