15 files changed, 95 insertions, 78 deletions
diff --git a/pkgs/development/compilers/gcc/4.8/default.nix b/pkgs/development/compilers/gcc/4.8/default.nix
index 3e9ddacac1b4..ed185b4be1a2 100644
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@@ -1,7 +1,7 @@
 { stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
-, langObjC ? targetPlatform.isDarwin
-, langObjCpp ? targetPlatform.isDarwin
+, langObjC ? stdenv.targetPlatform.isDarwin
+, langObjCpp ? stdenv.targetPlatform.isDarwin
 , langJava ? false
 , langGo ? false
 , profiledCompiler ? false
@@ -20,14 +20,14 @@
 , libXrandr ? null, libXi ? null, inputproto ? null, randrproto ? null
 , x11Support ? langJava
 , enableMultilib ? false
-, enablePlugin ? hostPlatform == buildPlatform # Whether to support user-supplied plug-ins
+, enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
-  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
+  stripped ? stdenv.hostPlatform == stdenv.buildPlatform
+          && stdenv.targetPlatform == stdenv.hostPlatform
 , gnused ? null
-, buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
 
@@ -42,7 +42,7 @@ assert cloog != null -> isl != null;
 assert libelf != null -> zlib != null;
 
 # Make sure we get GNU sed.
-assert hostPlatform.isDarwin -> gnused != null;
+assert stdenv.hostPlatform.isDarwin -> gnused != null;
 
 # The go frontend is written in c++
 assert langGo -> langCC;
@@ -54,6 +54,8 @@ let version = "4.8.5";
 
     enableParallelBuilding = true;
 
+    inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
     patches = [ ]
       ++ optional enableParallelBuilding ../parallel-bconfig.patch
       ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
diff --git a/pkgs/development/compilers/gcc/4.9/default.nix b/pkgs/development/compilers/gcc/4.9/default.nix
index 9b4444b905de..3f13562c1b8c 100644
--- a/pkgs/development/compilers/gcc/4.9/default.nix
+++ b/pkgs/development/compilers/gcc/4.9/default.nix
@@ -1,7 +1,7 @@
 { stdenv, targetPackages, fetchurl, noSysDirs, fetchpatch
 , langC ? true, langCC ? true, langFortran ? false
-, langObjC ? targetPlatform.isDarwin
-, langObjCpp ? targetPlatform.isDarwin
+, langObjC ? stdenv.targetPlatform.isDarwin
+, langObjCpp ? stdenv.targetPlatform.isDarwin
 , langJava ? false
 , langGo ? false
 , profiledCompiler ? false
@@ -20,14 +20,14 @@
 , libXrandr ? null, libXi ? null, inputproto ? null, randrproto ? null
 , x11Support ? langJava
 , enableMultilib ? false
-, enablePlugin ? hostPlatform == buildPlatform # Whether to support user-supplied plug-ins
+, enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
-  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
+  stripped ? stdenv.hostPlatform == stdenv.buildPlatform
+          && stdenv.targetPlatform == stdenv.hostPlatform
 , gnused ? null
-, buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
 
@@ -42,7 +42,7 @@ assert cloog != null -> isl != null;
 assert libelf != null -> zlib != null;
 
 # Make sure we get GNU sed.
-assert hostPlatform.isDarwin -> gnused != null;
+assert stdenv.hostPlatform.isDarwin -> gnused != null;
 
 # The go frontend is written in c++
 assert langGo -> langCC;
@@ -54,6 +54,8 @@ let version = "4.9.4";
 
     enableParallelBuilding = true;
 
+    inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
     patches =
       [ ../use-source-date-epoch.patch ]
       ++ optionals enableParallelBuilding [ ../parallel-bconfig.patch ./parallel-strsignal.patch ]
diff --git a/pkgs/development/compilers/gcc/5/default.nix b/pkgs/development/compilers/gcc/5/default.nix
index 3fdec1ec3103..497ca40c3ae6 100644
--- a/pkgs/development/compilers/gcc/5/default.nix
+++ b/pkgs/development/compilers/gcc/5/default.nix
@@ -1,7 +1,7 @@
 { stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
-, langObjC ? targetPlatform.isDarwin
-, langObjCpp ? targetPlatform.isDarwin
+, langObjC ? stdenv.targetPlatform.isDarwin
+, langObjCpp ? stdenv.targetPlatform.isDarwin
 , langJava ? false
 , langGo ? false
 , profiledCompiler ? false
@@ -20,15 +20,15 @@
 , libXrandr ? null, libXi ? null, inputproto ? null, randrproto ? null
 , x11Support ? langJava
 , enableMultilib ? false
-, enablePlugin ? hostPlatform == buildPlatform # Whether to support user-supplied plug-ins
+, enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
-  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
+  stripped ? stdenv.hostPlatform == stdenv.buildPlatform
+          && stdenv.targetPlatform == stdenv.hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
 
@@ -40,7 +40,7 @@ assert langJava     -> zip != null && unzip != null
 assert libelf != null -> zlib != null;
 
 # Make sure we get GNU sed.
-assert hostPlatform.isDarwin -> gnused != null;
+assert stdenv.hostPlatform.isDarwin -> gnused != null;
 
 # The go frontend is written in c++
 assert langGo -> langCC;
@@ -53,6 +53,8 @@ let version = "5.5.0";
 
     enableParallelBuilding = true;
 
+    inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
     patches =
       [ ../use-source-date-epoch.patch ]
       ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
diff --git a/pkgs/development/compilers/gcc/6/default.nix b/pkgs/development/compilers/gcc/6/default.nix
index 099e26375f41..3f5d3172d12f 100644
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@@ -1,7 +1,7 @@
 { stdenv, targetPackages, fetchurl, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
-, langObjC ? targetPlatform.isDarwin
-, langObjCpp ? targetPlatform.isDarwin
+, langObjC ? stdenv.targetPlatform.isDarwin
+, langObjCpp ? stdenv.targetPlatform.isDarwin
 , langJava ? false
 , langGo ? false
 , profiledCompiler ? false
@@ -20,15 +20,15 @@
 , libXrandr ? null, libXi ? null, inputproto ? null, randrproto ? null
 , x11Support ? langJava
 , enableMultilib ? false
-, enablePlugin ? hostPlatform == buildPlatform # Whether to support user-supplied plug-ins
+, enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
-  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
+  stripped ? stdenv.hostPlatform == stdenv.buildPlatform
+          && stdenv.targetPlatform == stdenv.hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
 
@@ -40,7 +40,7 @@ assert langJava     -> zip != null && unzip != null
 assert libelf != null -> zlib != null;
 
 # Make sure we get GNU sed.
-assert hostPlatform.isDarwin -> gnused != null;
+assert stdenv.hostPlatform.isDarwin -> gnused != null;
 
 # The go frontend is written in c++
 assert langGo -> langCC;
@@ -52,6 +52,8 @@ let version = "6.4.0";
 
     enableParallelBuilding = true;
 
+    inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
     patches =
       [ ../use-source-date-epoch.patch ]
       ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
diff --git a/pkgs/development/compilers/gcc/7/default.nix b/pkgs/development/compilers/gcc/7/default.nix
index 60e429cc4da1..30c1611f5fb3 100644
--- a/pkgs/development/compilers/gcc/7/default.nix
+++ b/pkgs/development/compilers/gcc/7/default.nix
@@ -1,7 +1,7 @@
 { stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
-, langObjC ? targetPlatform.isDarwin
-, langObjCpp ? targetPlatform.isDarwin
+, langObjC ? stdenv.targetPlatform.isDarwin
+, langObjCpp ? stdenv.targetPlatform.isDarwin
 , langGo ? false
 , profiledCompiler ? false
 , staticCompiler ? false
@@ -13,15 +13,15 @@
 , isl ? null # optional, for the Graphite optimization framework.
 , zlib ? null
 , enableMultilib ? false
-, enablePlugin ? hostPlatform == buildPlatform # Whether to support user-supplied plug-ins
+, enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
-  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
+  stripped ? stdenv.hostPlatform == stdenv.buildPlatform
+          && stdenv.targetPlatform == stdenv.hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
 
@@ -29,7 +29,7 @@
 assert libelf != null -> zlib != null;
 
 # Make sure we get GNU sed.
-assert hostPlatform.isDarwin -> gnused != null;
+assert stdenv.hostPlatform.isDarwin -> gnused != null;
 
 # The go frontend is written in c++
 assert langGo -> langCC;
@@ -41,6 +41,8 @@ let version = "7.3.0";
 
     enableParallelBuilding = true;
 
+    inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
     patches =
       [ # https://gcc.gnu.org/ml/gcc-patches/2018-02/msg00633.html
         ./riscv-pthread-reentrant.patch
diff --git a/pkgs/development/compilers/gcc/8/default.nix b/pkgs/development/compilers/gcc/8/default.nix
index a05c1c718128..727cd9cbdbd7 100644
--- a/pkgs/development/compilers/gcc/8/default.nix
+++ b/pkgs/development/compilers/gcc/8/default.nix
@@ -1,7 +1,7 @@
 { stdenv, targetPackages, fetchurl, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
-, langObjC ? targetPlatform.isDarwin
-, langObjCpp ? targetPlatform.isDarwin
+, langObjC ? stdenv.targetPlatform.isDarwin
+, langObjCpp ? stdenv.targetPlatform.isDarwin
 , langGo ? false
 , profiledCompiler ? false
 , staticCompiler ? false
@@ -13,15 +13,15 @@
 , isl ? null # optional, for the Graphite optimization framework.
 , zlib ? null
 , enableMultilib ? false
-, enablePlugin ? hostPlatform == buildPlatform # Whether to support user-supplied plug-ins
+, enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
-  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
+  stripped ? stdenv.hostPlatform == stdenv.buildPlatform
+          && stdenv.targetPlatform == stdenv.hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
 
@@ -29,7 +29,7 @@
 assert libelf != null -> zlib != null;
 
 # Make sure we get GNU sed.
-assert hostPlatform.isDarwin -> gnused != null;
+assert stdenv.hostPlatform.isDarwin -> gnused != null;
 
 # The go frontend is written in c++
 assert langGo -> langCC;
@@ -41,6 +41,8 @@ let version = "8.2.0";
 
     enableParallelBuilding = true;
 
+    inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
     patches =
          optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
       ++ optional noSysDirs ../no-sys-dirs.patch
diff --git a/pkgs/development/compilers/gcc/snapshot/default.nix b/pkgs/development/compilers/gcc/snapshot/default.nix
index 275b380e90f7..dd6de818117f 100644
--- a/pkgs/development/compilers/gcc/snapshot/default.nix
+++ b/pkgs/development/compilers/gcc/snapshot/default.nix
@@ -1,7 +1,7 @@
 { stdenv, targetPackages, fetchurl, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
-, langObjC ? targetPlatform.isDarwin
-, langObjCpp ? targetPlatform.isDarwin
+, langObjC ? stdenv.targetPlatform.isDarwin
+, langObjCpp ? stdenv.targetPlatform.isDarwin
 , langGo ? false
 , profiledCompiler ? false
 , staticCompiler ? false
@@ -13,16 +13,16 @@
 , isl ? null # optional, for the Graphite optimization framework.
 , zlib ? null
 , enableMultilib ? false
-, enablePlugin ? hostPlatform == buildPlatform # Whether to support user-supplied plug-ins
+, enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
-  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
+  stripped ? stdenv.hostPlatform == stdenv.buildPlatform
+          && stdenv.targetPlatform == stdenv.hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
 , flex ? null
-, buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
 
@@ -30,7 +30,7 @@
 assert libelf != null -> zlib != null;
 
 # Make sure we get GNU sed.
-assert hostPlatform.isDarwin -> gnused != null;
+assert stdenv.hostPlatform.isDarwin -> gnused != null;
 
 # The go frontend is written in c++
 assert langGo -> langCC;
@@ -42,6 +42,8 @@ let version = "7-20170409";
 
     enableParallelBuilding = true;
 
+    inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
     patches =
       [ ]
       ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
diff --git a/pkgs/development/compilers/ghc/7.10.3.nix b/pkgs/development/compilers/ghc/7.10.3.nix
index 0cf3a4cb12b4..9c87d815b4a9 100644
--- a/pkgs/development/compilers/ghc/7.10.3.nix
+++ b/pkgs/development/compilers/ghc/7.10.3.nix
@@ -1,5 +1,4 @@
 { stdenv, targetPackages
-, buildPlatform, hostPlatform, targetPlatform
 
 # build-tools
 , bootPkgs, hscolour
@@ -8,7 +7,7 @@
 
 , libiconv ? null, ncurses
 
-, useLLVM ? !targetPlatform.isx86
+, useLLVM ? !stdenv.targetPlatform.isx86
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
@@ -19,7 +18,7 @@
   enableIntegerSimple ? !(gmp.meta.available or false), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? targetPlatform != hostPlatform
+  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
 
 , # Whether to build dynamic libs for the standard library (on the target
   # platform). Static libs are always built.
@@ -27,10 +26,12 @@
 
 , # What flavour to build. An empty string indicates no
   # specific flavour and falls back to ghc default values.
-  ghcFlavour ? stdenv.lib.optionalString (targetPlatform != hostPlatform) "perf-cross"
+  ghcFlavour ? stdenv.lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) "perf-cross"
 }:
 
 let
+  inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
   inherit (bootPkgs) ghc;
 
   # TODO(@Ericson2314) Make unconditional
diff --git a/pkgs/development/compilers/ghc/8.0.2.nix b/pkgs/development/compilers/ghc/8.0.2.nix
index ddd9c27589ac..935d09b57446 100644
--- a/pkgs/development/compilers/ghc/8.0.2.nix
+++ b/pkgs/development/compilers/ghc/8.0.2.nix
@@ -1,5 +1,4 @@
 { stdenv, targetPackages
-, buildPlatform, hostPlatform, targetPlatform
 
 # build-tools
 , bootPkgs, hscolour
@@ -7,7 +6,7 @@
 
 , libiconv ? null, ncurses
 
-, useLLVM ? !targetPlatform.isx86
+, useLLVM ? !stdenv.targetPlatform.isx86
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
@@ -18,7 +17,7 @@
   enableIntegerSimple ? !(gmp.meta.available or false), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? targetPlatform != hostPlatform
+  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
 
 , # Whether to build dynamic libs for the standard library (on the target
   # platform). Static libs are always built.
@@ -26,12 +25,14 @@
 
 , # What flavour to build. An empty string indicates no
   # specific flavour and falls back to ghc default values.
-  ghcFlavour ? stdenv.lib.optionalString (targetPlatform != hostPlatform) "perf-cross"
+  ghcFlavour ? stdenv.lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) "perf-cross"
 }:
 
 assert !enableIntegerSimple -> gmp != null;
 
 let
+  inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
   inherit (bootPkgs) ghc;
 
   # TODO(@Ericson2314) Make unconditional
diff --git a/pkgs/development/compilers/ghc/8.2.2.nix b/pkgs/development/compilers/ghc/8.2.2.nix
index 79c910e5fd21..cf448d8d849a 100644
--- a/pkgs/development/compilers/ghc/8.2.2.nix
+++ b/pkgs/development/compilers/ghc/8.2.2.nix
@@ -1,5 +1,4 @@
 { stdenv, targetPackages
-, buildPlatform, hostPlatform, targetPlatform
 
 # build-tools
 , bootPkgs, alex, happy, hscolour
@@ -8,7 +7,7 @@
 
 , libiconv ? null, ncurses
 
-, useLLVM ? !targetPlatform.isx86 || (targetPlatform.isMusl && hostPlatform != targetPlatform)
+, useLLVM ? !stdenv.targetPlatform.isx86 || (stdenv.targetPlatform.isMusl && stdenv.hostPlatform != stdenv.targetPlatform)
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
@@ -19,7 +18,7 @@
   enableIntegerSimple ? !(gmp.meta.available or false), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? targetPlatform != hostPlatform
+  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
 
 , # Whether to build dynamic libs for the standard library (on the target
   # platform). Static libs are always built.
@@ -27,7 +26,7 @@
 
 , # What flavour to build. An empty string indicates no
   # specific flavour and falls back to ghc default values.
-  ghcFlavour ? stdenv.lib.optionalString (targetPlatform != hostPlatform) "perf-cross"
+  ghcFlavour ? stdenv.lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) "perf-cross"
 , # Whether to backport https://phabricator.haskell.org/D4388 for
   # deterministic profiling symbol names, at the cost of a slightly
   # non-standard GHC API
@@ -37,6 +36,8 @@
 assert !enableIntegerSimple -> gmp != null;
 
 let
+  inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
   inherit (bootPkgs) ghc;
 
   # TODO(@Ericson2314) Make unconditional
diff --git a/pkgs/development/compilers/ghc/8.4.3.nix b/pkgs/development/compilers/ghc/8.4.3.nix
index f30c8dd8622e..aa9fab184364 100644
--- a/pkgs/development/compilers/ghc/8.4.3.nix
+++ b/pkgs/development/compilers/ghc/8.4.3.nix
@@ -1,5 +1,4 @@
 { stdenv, targetPackages
-, buildPlatform, hostPlatform, targetPlatform
 
 # build-tools
 , bootPkgs, alex, happy, hscolour
@@ -7,7 +6,7 @@
 
 , libiconv ? null, ncurses
 
-, useLLVM ? !targetPlatform.isx86 || (targetPlatform.isMusl && hostPlatform != targetPlatform)
+, useLLVM ? !stdenv.targetPlatform.isx86 || (stdenv.targetPlatform.isMusl && stdenv.hostPlatform != stdenv.targetPlatform)
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
@@ -18,18 +17,18 @@
   enableIntegerSimple ? !(gmp.meta.available or false), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? targetPlatform != hostPlatform
+  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
 
 , # Whether to build dynamic libs for the standard library (on the target
   # platform). Static libs are always built.
-  enableShared ? !targetPlatform.isWindows && !targetPlatform.useiOSPrebuilt
+  enableShared ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.useiOSPrebuilt
 
 , # Whetherto build terminfo.
-  enableTerminfo ? !targetPlatform.isWindows
+  enableTerminfo ? !stdenv.targetPlatform.isWindows
 
 , # What flavour to build. An empty string indicates no
   # specific flavour and falls back to ghc default values.
-  ghcFlavour ? stdenv.lib.optionalString (targetPlatform != hostPlatform) "perf-cross"
+  ghcFlavour ? stdenv.lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) "perf-cross"
 , # Whether to backport https://phabricator.haskell.org/D4388 for
   # deterministic profiling symbol names, at the cost of a slightly
   # non-standard GHC API
@@ -39,6 +38,8 @@
 assert !enableIntegerSimple -> gmp != null;
 
 let
+  inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
   inherit (bootPkgs) ghc;
 
   # TODO(@Ericson2314) Make unconditional
diff --git a/pkgs/development/compilers/ghc/8.6.1.nix b/pkgs/development/compilers/ghc/8.6.1.nix
index fdb60ce3f2e8..7fcb52969151 100644
--- a/pkgs/development/compilers/ghc/8.6.1.nix
+++ b/pkgs/development/compilers/ghc/8.6.1.nix
@@ -1,5 +1,4 @@
 { stdenv, targetPackages
-, buildPlatform, hostPlatform, targetPlatform
 
 # build-tools
 , bootPkgs, alex, happy, hscolour
@@ -7,7 +6,7 @@
 
 , libiconv ? null, ncurses
 
-, useLLVM ? !targetPlatform.isx86 || (targetPlatform.isMusl && hostPlatform != targetPlatform)
+, useLLVM ? !stdenv.targetPlatform.isx86 || (stdenv.targetPlatform.isMusl && stdenv.hostPlatform != stdenv.targetPlatform)
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
@@ -18,23 +17,25 @@
   enableIntegerSimple ? !(gmp.meta.available or false), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? targetPlatform != hostPlatform
+  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
 
 , # Whether to build dynamic libs for the standard library (on the target
   # platform). Static libs are always built.
-  enableShared ? !targetPlatform.isWindows && !targetPlatform.useiOSPrebuilt
+  enableShared ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.useiOSPrebuilt
 
 , # Whetherto build terminfo.
-  enableTerminfo ? !targetPlatform.isWindows
+  enableTerminfo ? !stdenv.targetPlatform.isWindows
 
 , # What flavour to build. An empty string indicates no
   # specific flavour and falls back to ghc default values.
-  ghcFlavour ? stdenv.lib.optionalString (targetPlatform != hostPlatform) "perf-cross"
+  ghcFlavour ? stdenv.lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) "perf-cross"
 }:
 
 assert !enableIntegerSimple -> gmp != null;
 
 let
+  inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
   inherit (bootPkgs) ghc;
 
   # TODO(@Ericson2314) Make unconditional
diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 2824ce669ee6..ee95bd0f6047 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -1,5 +1,4 @@
 { stdenv, targetPackages
-, buildPlatform, hostPlatform, targetPlatform
 
 # build-tools
 , bootPkgs, alex, happy, hscolour
@@ -7,7 +6,7 @@
 
 , libiconv ? null, ncurses
 
-, useLLVM ? !targetPlatform.isx86 || (targetPlatform.isMusl && hostPlatform != targetPlatform)
+, useLLVM ? !stdenv.targetPlatform.isx86 || (stdenv.targetPlatform.isMusl && stdenv.hostPlatform != stdenv.targetPlatform)
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
@@ -18,22 +17,24 @@
   enableIntegerSimple ? !(gmp.meta.available or false), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? targetPlatform != hostPlatform
+  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
 
 , # Whether to build dynamic libs for the standard library (on the target
   # platform). Static libs are always built.
-  enableShared ? !targetPlatform.isWindows && !targetPlatform.useAndroidPrebuilt
+  enableShared ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.useAndroidPrebuilt
 
 , # Whetherto build terminfo.
-  enableTerminfo ? !targetPlatform.isWindows
+  enableTerminfo ? !stdenv.targetPlatform.isWindows
 
 , version ? "8.5.20180118"
 , # What flavour to build. An empty string indicates no
   # specific flavour and falls back to ghc default values.
-  ghcFlavour ? stdenv.lib.optionalString (targetPlatform != hostPlatform) "perf-cross"
+  ghcFlavour ? stdenv.lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) "perf-cross"
 }:
 
 let
+  inherit (stdenv) buildPlatform hostPlatform targetPlatform;
+
   inherit (bootPkgs) ghc;
 
   # TODO(@Ericson2314) Make unconditional
diff --git a/pkgs/development/compilers/llvm/3.9/llvm.nix b/pkgs/development/compilers/llvm/3.9/llvm.nix
index dfeddf2fe65a..9e7fbbe96c35 100644
--- a/pkgs/development/compilers/llvm/3.9/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.9/llvm.nix
@@ -13,13 +13,11 @@
 , zlib
 , compiler-rt_src
 , debugVersion ? false
-, enableSharedLibraries ? (buildPlatform == hostPlatform)
+, enableSharedLibraries ? (stdenv.buildPlatform == stdenv.hostPlatform)
 , buildPackages
-, buildPlatform
-, hostPlatform
 }:
 
-assert (hostPlatform != buildPlatform) -> !enableSharedLibraries;
+assert (stdenv.hostPlatform != stdenv.buildPlatform) -> !enableSharedLibraries;
 
 let
   src = fetch "llvm" "1vi9sf7rx1q04wj479rsvxayb6z740iaz3qniwp266fgp5a07n8z";
@@ -131,7 +129,7 @@ in stdenv.mkDerivation rec {
     ++ stdenv.lib.optionals (isDarwin) [
     "-DLLVM_ENABLE_LIBCXX=ON"
     "-DCAN_TARGET_i386=false"
-  ] ++ stdenv.lib.optionals (buildPlatform != hostPlatform) [
+  ] ++ stdenv.lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
     "-DCMAKE_CROSSCOMPILING=True"
     "-DLLVM_TABLEGEN=${buildPackages.llvmPackages_39.llvm}/bin/llvm-tblgen"
   ] ++ stdenv.lib.optionals stdenv.hostPlatform.isMusl [
diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index 23aa750060a3..9c9788ff4834 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -12,7 +12,6 @@
 , targetToolchains
 , doCheck ? true
 , broken ? false
-, buildPlatform, hostPlatform
 }:
 
 let