diff --git a/BUILD.gn b/BUILD.gn
index c62b1e96100678c82ae04dc671be6e34232e1380..d35c608ba1d632f4e6405fb4c8faac6a37ecc4cb 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -19,7 +19,7 @@ group("flutter") {
 
   public_deps = []
 
-  if (!(is_fuchsia && using_fuchsia_sdk)) {
+  if (!is_fuchsia) {
     public_deps += [
       "//flutter/lib/snapshot:generate_snapshot_bin",
       "//flutter/lib/snapshot:kernel_platform_files",
@@ -40,14 +40,14 @@ group("flutter") {
     public_deps += [ "//flutter/tools/const_finder" ]
   }
 
-  if (is_fuchsia && using_fuchsia_sdk) {
+  if (is_fuchsia) {
     public_deps += [
       "//flutter/shell/platform/fuchsia",
       "//flutter/shell/testing($host_toolchain)",
     ]
   }
 
-  if (!is_fuchsia && !is_fuchsia_host) {
+  if (!is_fuchsia) {
     if (current_toolchain == host_toolchain) {
       public_deps += [
         "//flutter/flutter_frontend_server:frontend_server",
diff --git a/common/config.gni b/common/config.gni
index 1b7d18f670ccde4ca61589fc3a27851f3f9a8a12..a3eb20b19a5ae7e03092c1eb2d907751989d21e7 100644
--- a/common/config.gni
+++ b/common/config.gni
@@ -12,12 +12,8 @@ if (target_cpu == "arm" || target_cpu == "arm64") {
   import("//build/config/arm.gni")
 }
 
-if (is_ios || is_mac) {
-  if (using_fuchsia_sdk) {
-    import("//build/toolchain/clang.gni")
-  } else {
-    import("//build/toolchain/clang_toolchain.gni")
-  }
+if (is_fuchsia) {
+  import("//build/toolchain/clang.gni")
 }
 
 declare_args() {
@@ -64,7 +60,8 @@ if (flutter_runtime_mode == "debug") {
   feature_defines_list += [ "FLUTTER_RUNTIME_MODE=0" ]
 }
 
-if (is_fuchsia && using_fuchsia_sdk) {
+if (is_fuchsia) {
+  # TODO(chinmaygarde): This is always set. The macro may now be removed.
   feature_defines_list += [ "FUCHSIA_SDK=1" ]
 }
 
diff --git a/common/fuchsia_config.gni b/common/fuchsia_config.gni
index c8c55b59c5cf2a439e73d2ced9bd12c19e1b38d7..96e120fba29d73211b5dddb666cd612a0f833f8e 100644
--- a/common/fuchsia_config.gni
+++ b/common/fuchsia_config.gni
@@ -4,7 +4,7 @@
 
 import("config.gni")
 
-if (is_fuchsia && using_fuchsia_sdk) {
+if (is_fuchsia) {
   dart_tools_root = "//flutter/tools/fuchsia/dart"
   fuchsia_base = "//flutter/shell/platform/fuchsia"
   flutter_runner_base = "$fuchsia_base/flutter/"
diff --git a/flow/BUILD.gn b/flow/BUILD.gn
index e25b5dc8957a30e2a2734b8e10096cb500762812..c3fea8568e9eaf84e7a6dd3b6ed7b9d05d810bee 100644
--- a/flow/BUILD.gn
+++ b/flow/BUILD.gn
@@ -86,20 +86,11 @@ source_set("flow") {
       "view_holder.h",
     ]
 
-    if (using_fuchsia_sdk) {
-      public_deps += [
-        "$fuchsia_sdk_root/fidl:fuchsia.ui.app",
-        "$fuchsia_sdk_root/fidl:fuchsia.ui.gfx",
-        "$fuchsia_sdk_root/pkg:scenic_cpp",
-      ]
-    } else {
-      public_deps += [
-        "//garnet/public/lib/ui/scenic/cpp",
-        "//sdk/fidl/fuchsia.ui.scenic",
-        "//topaz/public/dart-pkg/zircon",
-        "//zircon/public/lib/zx",
-      ]
-    }
+    public_deps += [
+      "$fuchsia_sdk_root/fidl:fuchsia.ui.app",
+      "$fuchsia_sdk_root/fidl:fuchsia.ui.gfx",
+      "$fuchsia_sdk_root/pkg:scenic_cpp",
+    ]
   }
 }
 
diff --git a/fml/BUILD.gn b/fml/BUILD.gn
index 08d60aaad7b9f9e9fd5e458b93961299ab927ee9..12d30ee83f8d8fcc84dc247d63e401abae156d8b 100644
--- a/fml/BUILD.gn
+++ b/fml/BUILD.gn
@@ -180,25 +180,14 @@ source_set("fml") {
       "platform/fuchsia/paths_fuchsia.cc",
     ]
 
-    if (using_fuchsia_sdk) {
-      public_deps += [
-        "$fuchsia_sdk_root/pkg:async-cpp",
-        "$fuchsia_sdk_root/pkg:async-loop-cpp",
-        "$fuchsia_sdk_root/pkg:async-loop-default",
-        "$fuchsia_sdk_root/pkg:trace",
-        "$fuchsia_sdk_root/pkg:trace-engine",
-        "$fuchsia_sdk_root/pkg:zx",
-      ]
-    } else {
-      public_deps += [
-        "//zircon/public/lib/async-cpp",
-        "//zircon/public/lib/async-loop-cpp",
-        "//zircon/public/lib/async-loop-default",
-        "//zircon/public/lib/trace",
-        "//zircon/public/lib/trace-engine",
-        "//zircon/public/lib/zx",
-      ]
-    }
+    public_deps += [
+      "$fuchsia_sdk_root/pkg:async-cpp",
+      "$fuchsia_sdk_root/pkg:async-loop-cpp",
+      "$fuchsia_sdk_root/pkg:async-loop-default",
+      "$fuchsia_sdk_root/pkg:trace",
+      "$fuchsia_sdk_root/pkg:trace-engine",
+      "$fuchsia_sdk_root/pkg:zx",
+    ]
   }
 
   if (is_win) {
@@ -278,7 +267,7 @@ executable("fml_unittests") {
     "//flutter/testing",
   ]
 
-  if (is_fuchsia && using_fuchsia_sdk) {
+  if (is_fuchsia) {
     libs = [ "${fuchsia_sdk_path}/arch/${target_cpu}/sysroot/lib/libzircon.so" ]
   }
 }
diff --git a/lib/snapshot/BUILD.gn b/lib/snapshot/BUILD.gn
index 41740be8f391a8bd9030990e3c002c2a3a4701fc..f21f3dffdd2c63433af884d17b1a6be0e00b8b35 100644
--- a/lib/snapshot/BUILD.gn
+++ b/lib/snapshot/BUILD.gn
@@ -30,12 +30,7 @@ compiled_action("generate_snapshot_bin") {
     tool = "//third_party/dart/runtime/bin:gen_snapshot"
   }
 
-  if ((is_fuchsia || is_fuchsia_host) && !using_fuchsia_sdk) {
-    platform_kernel =
-        "$root_out_dir/flutter_runner_patched_sdk/platform_strong.dill"
-  } else {
-    platform_kernel = "$root_out_dir/flutter_patched_sdk/platform_strong.dill"
-  }
+  platform_kernel = "$root_out_dir/flutter_patched_sdk/platform_strong.dill"
 
   inputs = [
     platform_kernel,
@@ -217,11 +212,7 @@ bin_to_linkable("platform_strong_dill_linkable") {
   deps = [
     ":kernel_platform_files",
   ]
-  if ((is_fuchsia || is_fuchsia_host) && !using_fuchsia_sdk) {
-    input = "$root_out_dir/flutter_runner_patched_sdk/platform_strong.dill"
-  } else {
-    input = "$root_out_dir/flutter_patched_sdk/platform_strong.dill"
-  }
+  input = "$root_out_dir/flutter_patched_sdk/platform_strong.dill"
   symbol = "kPlatformStrongDill"
   size_symbol = "kPlatformStrongDillSize"
   executable = false
@@ -283,16 +274,8 @@ compile_platform("strong_platform") {
 }
 
 # Fuchsia's snapshot requires a different platform with extra dart: libraries.
-if ((is_fuchsia || is_fuchsia_host) && !using_fuchsia_sdk) {
-  group("kernel_platform_files") {
-    public_deps = [
-      "//topaz/runtime/flutter_runner/kernel:kernel_platform_files",
-    ]
-  }
-} else {
-  group("kernel_platform_files") {
-    public_deps = [
-      ":strong_platform",
-    ]
-  }
+group("kernel_platform_files") {
+  public_deps = [
+    ":strong_platform",
+  ]
 }
diff --git a/lib/ui/BUILD.gn b/lib/ui/BUILD.gn
index 4d3210d3bef37a98e0d18d82f64323d260a3a2b9..a581708f03c2463aa03f6a652642ad70e19d8699 100644
--- a/lib/ui/BUILD.gn
+++ b/lib/ui/BUILD.gn
@@ -135,15 +135,11 @@ source_set("ui") {
       "compositing/scene_host.h",
     ]
 
-    if (using_fuchsia_sdk) {
-      deps += [
-        "$fuchsia_sdk_root/pkg:async-cpp",
-        "//flutter/shell/platform/fuchsia/dart-pkg/fuchsia",
-        "//flutter/shell/platform/fuchsia/dart-pkg/zircon",
-      ]
-    } else {
-      deps += [ "//topaz/public/dart-pkg/zircon" ]
-    }
+    deps += [
+      "$fuchsia_sdk_root/pkg:async-cpp",
+      "//flutter/shell/platform/fuchsia/dart-pkg/fuchsia",
+      "//flutter/shell/platform/fuchsia/dart-pkg/zircon",
+    ]
   }
 }
 
diff --git a/shell/common/BUILD.gn b/shell/common/BUILD.gn
index 8e4a48e2bb0005c5decedb0bef7bbbff2be144bd..66684679c3de3786fef071d21a4d54b387e4077f 100644
--- a/shell/common/BUILD.gn
+++ b/shell/common/BUILD.gn
@@ -12,11 +12,8 @@ if (is_fuchsia) {
 }
 
 config("vulkan_config") {
-  if (using_fuchsia_sdk) {
+  if (is_fuchsia) {
     include_dirs = [ "$fuchsia_sdk_root/vulkan/include" ]
-  } else if (is_fuchsia) {
-    include_dirs =
-        [ "//third_party/vulkan_loader_and_validation_layers/include" ]
   } else {
     include_dirs = [ "//third_party/vulkan/src" ]
   }
diff --git a/shell/platform/BUILD.gn b/shell/platform/BUILD.gn
index 4b881909d14e265e7261a2669707e439a30c9333..925177e67472b031e9c9d7daf809d3333f46f374 100644
--- a/shell/platform/BUILD.gn
+++ b/shell/platform/BUILD.gn
@@ -27,11 +27,9 @@ group("platform") {
       "windows",
     ]
   } else if (is_fuchsia) {
-    if (using_fuchsia_sdk) {
-      deps = [
-        "fuchsia",
-      ]
-    }
+    deps = [
+      "fuchsia",
+    ]
   } else {
     assert(false, "Unknown/Unsupported platform.")
   }
diff --git a/shell/platform/fuchsia/BUILD.gn b/shell/platform/fuchsia/BUILD.gn
index 9afc96bc02d4079f04a85d17e36e339396fd33a6..050719ec7f62386e45486065d535285a7b58a762 100644
--- a/shell/platform/fuchsia/BUILD.gn
+++ b/shell/platform/fuchsia/BUILD.gn
@@ -7,7 +7,7 @@ import("//flutter/common/config.gni")
 import("//flutter/tools/fuchsia/dart.gni")
 import("//flutter/tools/fuchsia/fuchsia_host_bundle.gni")
 
-if (using_fuchsia_sdk) {
+if (is_fuchsia) {
   product_suffix = ""
   is_product = false
 
diff --git a/shell/platform/fuchsia/flutter/BUILD.gn b/shell/platform/fuchsia/flutter/BUILD.gn
index 8e09a13f27d6c420e77a7f3e1df572213bd12388..bd4da2779d5079153e766f4cb804752dcd570005 100644
--- a/shell/platform/fuchsia/flutter/BUILD.gn
+++ b/shell/platform/fuchsia/flutter/BUILD.gn
@@ -25,17 +25,6 @@ shell_gpu_configuration("fuchsia_gpu_configuration") {
 # 1. Kernel snapshot framework mode.
 # 2. Profiler symbols.
 
-# Dependencies for flutter tooling
-#
-# While not required to run a flutter mod, these allow interacting
-# with flutter via the fx tool and need to be built.
-#
-# This is only for builds in topaz tree.
-flutter_tool_deps = []
-if (!using_fuchsia_sdk) {
-  flutter_tool_deps += [ "//third_party/dart-pkg/git/flutter/packages/flutter_tools:fuchsia_attach($host_toolchain)" ]
-}
-
 flutter_runner("jit") {
   output_name = "flutter_jit_runner"
   product = false
@@ -50,9 +39,9 @@ flutter_runner("jit") {
   }
 
   extra_deps = [
-                 "//third_party/dart/runtime:libdart_jit",
-                 "//third_party/dart/runtime/platform:libdart_platform_jit",
-               ] + flutter_tool_deps
+    "//third_party/dart/runtime:libdart_jit",
+    "//third_party/dart/runtime/platform:libdart_platform_jit",
+  ]
 }
 
 flutter_runner("jit_product") {
diff --git a/shell/testing/BUILD.gn b/shell/testing/BUILD.gn
index d7b793320b568d4485daa64f066eba231e3d9840..fce083fc12b1b680d98bcbfefdc08712f1681988 100644
--- a/shell/testing/BUILD.gn
+++ b/shell/testing/BUILD.gn
@@ -29,10 +29,6 @@ executable("testing") {
   ]
 
   if (is_fuchsia) {
-    if (!using_fuchsia_sdk) {
-      deps += [ "//garnet/public/lib/ui/scenic:client" ]
-    } else {
-      deps += [ "$fuchsia_sdk_root/pkg:scenic_cpp" ]
-    }
+    deps += [ "$fuchsia_sdk_root/pkg:scenic_cpp" ]
   }
 }
diff --git a/sky/packages/sky_engine/BUILD.gn b/sky/packages/sky_engine/BUILD.gn
index d0af03dc963753d3f4fcb2aaf3cccc2274a2f0a7..9d627c5dbeb5e1b50dbf6eb9b046e6736278ef31 100644
--- a/sky/packages/sky_engine/BUILD.gn
+++ b/sky/packages/sky_engine/BUILD.gn
@@ -229,23 +229,3 @@ dart_pkg("sky_engine") {
     "$service_isolate_dir/vmservice_server.dart",
   ]
 }
-
-if (is_fuchsia && !using_fuchsia_sdk) {
-  import("//build/dart/dart_library.gni")
-
-  dart_library("sky_engine_dart") {
-    package_name = "sky_engine"
-
-    package_root = "$root_gen_dir/dart-pkg/sky_engine"
-
-    sources = []
-
-    disable_analysis = true
-
-    non_dart_deps = [
-      # This will ensure all the source files needed for this package are
-      # copied to the right location.
-      ":sky_engine",
-    ]
-  }
-}
diff --git a/vulkan/BUILD.gn b/vulkan/BUILD.gn
index 13781b5a66141bbc10c742fd2faaa905017ba08d..c701763ea121f5ce14c96cf6028fa04963a14817 100644
--- a/vulkan/BUILD.gn
+++ b/vulkan/BUILD.gn
@@ -5,17 +5,13 @@
 import("//build/fuchsia/sdk.gni")
 
 config("vulkan_config") {
-  if (using_fuchsia_sdk) {
-    include_dirs = [ "$fuchsia_sdk_root/vulkan/include" ]
-  } else if (is_fuchsia) {
-    include_dirs =
-        [ "//third_party/vulkan_loader_and_validation_layers/include" ]
-  } else {
-    include_dirs = [ "//third_party/vulkan/src" ]
-  }
-
+  include_dirs = []
+  defines = []
   if (is_fuchsia) {
-    defines = [ "VK_USE_PLATFORM_FUCHSIA=1" ]
+    include_dirs += [ "$fuchsia_sdk_root/vulkan/include" ]
+    defines += [ "VK_USE_PLATFORM_FUCHSIA=1" ]
+  } else {
+    include_dirs += [ "//third_party/vulkan/src" ]
   }
 }