1 files changed, 29 insertions, 12 deletions

diff --git a/pkgs/development/compilers/ghc/8.2.1.nix b/pkgs/development/compilers/ghc/8.2.1.nix
index dde56df8131..a3d2f73c87e 100644
--- a/pkgs/development/compilers/ghc/8.2.1.nix
+++ b/pkgs/development/compilers/ghc/8.2.1.nix
@@ -1,16 +1,30 @@
-{ stdenv, lib, fetchurl, bootPkgs, perl, ncurses, libiconv, binutils, coreutils
-, autoconf, automake, happy, alex, python3, sphinx, hscolour
-, buildPlatform, targetPlatform , selfPkgs, cross ? null
+{ stdenv, __targetPackages
+, buildPlatform, hostPlatform, targetPlatform
+, selfPkgs, cross ? null
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+# build-tools
+, bootPkgs, alex, happy, hscolour
+, autoconf, automake, binutils, coreutils, fetchurl, perl, python3, sphinx
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be build with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
 }:
 
+assert !enableIntegerSimple -> gmp != null;
+
 let
   inherit (bootPkgs) ghc;
+
   version = "8.2.1";
 
+  # TODO(@Ericson2314) Make unconditional
+  prefix = stdenv.lib.optionalString
+    (targetPlatform != hostPlatform)
+    "${targetPlatform.config}-";
+  
   commonBuildInputs = [ alex autoconf automake ghc happy hscolour perl python3 sphinx ];
   commonPreConfigure =  ''
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
@@ -21,9 +35,10 @@ let
   '' + stdenv.lib.optionalString enableIntegerSimple ''
     echo "INTEGER_LIBRARY=integer-simple" > mk/build.mk
   '';
-in stdenv.mkDerivation (rec {
+in
+stdenv.mkDerivation (rec {
   inherit version;
-  name = "ghc-${version}";
+  name = "${prefix}ghc-${version}";
 
   src = fetchurl {
     url = "https://downloads.haskell.org/~ghc/${version}/${name}-src.tar.xz";
@@ -52,15 +67,17 @@ in stdenv.mkDerivation (rec {
 
   # required, because otherwise all symbols from HSffi.o are stripped, and
   # that in turn causes GHCi to abort
-  stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
+  stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!targetPlatform.isDarwin) "--keep-file-symbols";
 
   checkTarget = "test";
 
+  # zsh and other shells are smart about `{ghc}` but bash isn't, and doesn't
+  # treat that as a unary `{x,y,z,..}` repetition.
   postInstall = ''
-    paxmark m $out/lib/${name}/bin/{ghc,haddock}
+    paxmark m $out/lib/${name}/bin/${if targetPlatform != hostPlatform then "ghc" else "{ghc,haddock}"}
 
     # Install the bash completion file.
-    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/ghc
+    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${prefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
@@ -73,7 +90,7 @@ in stdenv.mkDerivation (rec {
   outputs = [ "out" "doc" ];
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs prefix;
   } // stdenv.lib.optionalAttrs (targetPlatform != buildPlatform) {
     crossCompiler = selfPkgs.ghc.override {
       cross = targetPlatform;
@@ -105,7 +122,7 @@ in stdenv.mkDerivation (rec {
     "--enable-bootstrap-with-devel-snapshot"
   ] ++
     # fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
-    lib.optional (cross.config or null == "aarch64-apple-darwin14") "--disable-large-address-space";
+    stdenv.lib.optional (cross.config or null == "aarch64-apple-darwin14") "--disable-large-address-space";
 
   buildInputs = commonBuildInputs ++ [ stdenv.ccCross stdenv.binutils ];