ghc: Clean up, and add `passthru.targetPrefix`, in preparation for cross

No hashes should be changed.

17 files changed, 187 insertions, 66 deletions

diff --git a/pkgs/development/compilers/ghc/6.10.2-binary.nix b/pkgs/development/compilers/ghc/6.10.2-binary.nix
index fb2e1a2a259..03831f3b6b6 100644
--- a/pkgs/development/compilers/ghc/6.10.2-binary.nix
+++ b/pkgs/development/compilers/ghc/6.10.2-binary.nix
@@ -4,6 +4,9 @@
 , enableIntegerSimple ? false
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 stdenv.mkDerivation rec {
   version = "6.10.2";
 
@@ -93,6 +96,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";
diff --git a/pkgs/development/compilers/ghc/6.10.4.nix b/pkgs/development/compilers/ghc/6.10.4.nix
index c56762edd24..18b4385834d 100644
--- a/pkgs/development/compilers/ghc/6.10.4.nix
+++ b/pkgs/development/compilers/ghc/6.10.4.nix
@@ -1,5 +1,8 @@
 {stdenv, fetchurl, libedit, ghc, perl, gmp, ncurses}:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 stdenv.mkDerivation rec {
   version = "6.10.4";
 
@@ -22,6 +25,8 @@ stdenv.mkDerivation rec {
 
   NIX_CFLAGS_COMPILE = "-fomit-frame-pointer";
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";
diff --git a/pkgs/development/compilers/ghc/6.12.3.nix b/pkgs/development/compilers/ghc/6.12.3.nix
index a46ef66a8cb..a9779ab49fb 100644
--- a/pkgs/development/compilers/ghc/6.12.3.nix
+++ b/pkgs/development/compilers/ghc/6.12.3.nix
@@ -1,5 +1,8 @@
 {stdenv, fetchurl, ghc, perl, gmp, ncurses}:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 stdenv.mkDerivation rec {
   version = "6.12.3";
 
@@ -33,6 +36,8 @@ stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags=["-S" "--keep-file-symbols"];
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";
diff --git a/pkgs/development/compilers/ghc/7.0.4-binary.nix b/pkgs/development/compilers/ghc/7.0.4-binary.nix
index c518c67d16b..d9b4ff16782 100644
--- a/pkgs/development/compilers/ghc/7.0.4-binary.nix
+++ b/pkgs/development/compilers/ghc/7.0.4-binary.nix
@@ -3,6 +3,9 @@
 , ncurses5, gmp, libiconv
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -131,6 +134,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin"];
 }
diff --git a/pkgs/development/compilers/ghc/7.0.4.nix b/pkgs/development/compilers/ghc/7.0.4.nix
index 9d052ddb246..a1931411d94 100644
--- a/pkgs/development/compilers/ghc/7.0.4.nix
+++ b/pkgs/development/compilers/ghc/7.0.4.nix
@@ -1,5 +1,8 @@
 { stdenv, fetchurl, ghc, perl, gmp, ncurses, libiconv }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 stdenv.mkDerivation rec {
   version = "7.0.4";
   name = "ghc-${version}";
@@ -42,6 +45,8 @@ stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags=["-S" "--keep-file-symbols"];
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";
diff --git a/pkgs/development/compilers/ghc/7.10.3-binary.nix b/pkgs/development/compilers/ghc/7.10.3-binary.nix
index 84b6157c865..6fed39317c7 100644
--- a/pkgs/development/compilers/ghc/7.10.3-binary.nix
+++ b/pkgs/development/compilers/ghc/7.10.3-binary.nix
@@ -4,6 +4,9 @@
 , gcc
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -148,6 +151,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin" "armv7l-linux"];
 }
diff --git a/pkgs/development/compilers/ghc/7.10.3.nix b/pkgs/development/compilers/ghc/7.10.3.nix
index d573a22e0ae..373172540db 100644
--- a/pkgs/development/compilers/ghc/7.10.3.nix
+++ b/pkgs/development/compilers/ghc/7.10.3.nix
@@ -1,14 +1,28 @@
-{ stdenv, fetchurl, fetchpatch, bootPkgs, perl, ncurses, libiconv, targetPackages, coreutils
-, libxml2, libxslt, docbook_xsl, docbook_xml_dtd_45, docbook_xml_dtd_42, hscolour
+{ stdenv, targetPackages
+, buildPlatform, hostPlatform, targetPlatform
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+# build-tools
+, bootPkgs, hscolour
+, coreutils, fetchurl, fetchpatch, perl
+, docbook_xsl, docbook_xml_dtd_45, docbook_xml_dtd_42, libxml2, libxslt
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be built 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;
 
+  # TODO(@Ericson2314) Make unconditional
+  targetPrefix = stdenv.lib.optionalString
+    (targetPlatform != hostPlatform)
+    "${targetPlatform.config}-";
+
   docFixes = fetchurl {
     url = "https://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3a.patch";
     sha256 = "1j45z4kcd3w1rzm4hapap2xc16bbh942qnzzdbdjcwqznsccznf0";
@@ -18,10 +32,10 @@ in
 
 stdenv.mkDerivation rec {
   version = "7.10.3";
-  name = "ghc-${version}";
+  name = "${targetPrefix}ghc-${version}";
 
   src = fetchurl {
-    url = "https://downloads.haskell.org/~ghc/${version}/${name}-src.tar.xz";
+    url = "https://downloads.haskell.org/~ghc/${version}/ghc-${version}-src.tar.xz";
     sha256 = "1vsgmic8csczl62ciz51iv8nhrkm72lyhbz7p7id13y2w7fcx46g";
   };
 
@@ -62,7 +76,7 @@ stdenv.mkDerivation rec {
 
   postInstall = ''
     # 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 $out/share/bash-completion/completions/${targetPrefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
@@ -73,7 +87,7 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs targetPrefix;
   };
 
   meta = {
diff --git a/pkgs/development/compilers/ghc/7.2.2.nix b/pkgs/development/compilers/ghc/7.2.2.nix
index dd3b5cb2ebc..15f860dd211 100644
--- a/pkgs/development/compilers/ghc/7.2.2.nix
+++ b/pkgs/development/compilers/ghc/7.2.2.nix
@@ -1,10 +1,14 @@
 { stdenv, fetchurl, ghc, perl, ncurses, libiconv
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+, # If enabled, GHC will be built 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
 }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+assert !enableIntegerSimple -> gmp != null;
+
 stdenv.mkDerivation rec {
   version = "7.2.2";
   name = "ghc-${version}";
@@ -51,6 +55,8 @@ stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags=["-S" "--keep-file-symbols"];
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";
diff --git a/pkgs/development/compilers/ghc/7.4.2-binary.nix b/pkgs/development/compilers/ghc/7.4.2-binary.nix
index 3cb28e2c820..70c8797c264 100644
--- a/pkgs/development/compilers/ghc/7.4.2-binary.nix
+++ b/pkgs/development/compilers/ghc/7.4.2-binary.nix
@@ -3,6 +3,9 @@
 , ncurses5, gmp, libiconv
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -133,6 +136,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin"];
 }
diff --git a/pkgs/development/compilers/ghc/7.4.2.nix b/pkgs/development/compilers/ghc/7.4.2.nix
index e5bc4724c9e..d28980a01d3 100644
--- a/pkgs/development/compilers/ghc/7.4.2.nix
+++ b/pkgs/development/compilers/ghc/7.4.2.nix
@@ -1,10 +1,14 @@
 { stdenv, fetchurl, ghc, perl, ncurses, libiconv
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+, # If enabled, GHC will be built 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
 }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+assert !enableIntegerSimple -> gmp != null;
+
 stdenv.mkDerivation rec {
   version = "7.4.2";
 
@@ -52,6 +56,8 @@ stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";
diff --git a/pkgs/development/compilers/ghc/7.6.3.nix b/pkgs/development/compilers/ghc/7.6.3.nix
index fde4ca2aa37..7549b43bce1 100644
--- a/pkgs/development/compilers/ghc/7.6.3.nix
+++ b/pkgs/development/compilers/ghc/7.6.3.nix
@@ -1,10 +1,14 @@
 { stdenv, fetchurl, ghc, perl, ncurses, libiconv
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+, # If enabled, GHC will be built 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
 }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+assert !enableIntegerSimple -> gmp != null;
+
 let
   # The "-Wa,--noexecstack" options might be needed only with GNU ld (as opposed
   # to the gold linker). It prevents binaries' stacks from being marked as
@@ -78,6 +82,8 @@ in stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";
diff --git a/pkgs/development/compilers/ghc/7.8.4-binary.nix b/pkgs/development/compilers/ghc/7.8.4-binary.nix
index 9525536ef0d..58a9370b321 100644
--- a/pkgs/development/compilers/ghc/7.8.4-binary.nix
+++ b/pkgs/development/compilers/ghc/7.8.4-binary.nix
@@ -3,6 +3,9 @@
 , ncurses5, gmp, libiconv
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -146,6 +149,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin"];
 }
diff --git a/pkgs/development/compilers/ghc/7.8.4.nix b/pkgs/development/compilers/ghc/7.8.4.nix
index 5a380c75c69..7cea395efc9 100644
--- a/pkgs/development/compilers/ghc/7.8.4.nix
+++ b/pkgs/development/compilers/ghc/7.8.4.nix
@@ -1,10 +1,14 @@
 { stdenv, fetchurl, ghc, perl, ncurses, libiconv
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+, # If enabled, GHC will be built 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
 }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+assert !enableIntegerSimple -> gmp != null;
+
 stdenv.mkDerivation (rec {
   version = "7.8.4";
   name = "ghc-${version}";
@@ -49,6 +53,8 @@ stdenv.mkDerivation (rec {
   # that in turn causes GHCi to abort
   stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";
diff --git a/pkgs/development/compilers/ghc/8.0.2.nix b/pkgs/development/compilers/ghc/8.0.2.nix
index d475e3438b4..924f927b0bc 100644
--- a/pkgs/development/compilers/ghc/8.0.2.nix
+++ b/pkgs/development/compilers/ghc/8.0.2.nix
@@ -1,21 +1,33 @@
-{ stdenv, lib, fetchurl, fetchpatch, bootPkgs, perl, ncurses, libiconv, targetPackages, coreutils
-, hscolour, patchutils, sphinx
+{ stdenv, targetPackages
+, buildPlatform, hostPlatform, targetPlatform
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+# build-tools
+, bootPkgs, hscolour
+, coreutils, fetchurl, fetchpatch, patchutils, perl, sphinx
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
-, cross ? null
+  enableIntegerSimple ? false, gmp ? null
 }:
 
+assert !enableIntegerSimple -> gmp != null;
+
 let
   inherit (bootPkgs) ghc;
+
+  # TODO(@Ericson2314) Make unconditional
+  targetPrefix = stdenv.lib.optionalString
+    (targetPlatform != hostPlatform)
+    "${targetPlatform.config}-";
 in
 stdenv.mkDerivation rec {
   version = "8.0.2";
-  name = "ghc-${version}";
+  name = "${targetPrefix}ghc-${version}";
 
   src = fetchurl {
-    url = "https://downloads.haskell.org/~ghc/8.0.2/${name}-src.tar.xz";
+    url = "https://downloads.haskell.org/~ghc/8.0.2/ghc-${version}-src.tar.xz";
     sha256 = "1c8qc4fhkycynk4g1f9hvk53dj6a1vvqi6bklqznns6hw59m8qhi";
   };
 
@@ -47,19 +59,20 @@ stdenv.mkDerivation rec {
     "--with-gmp-includes=${gmp.dev}/include" "--with-gmp-libraries=${gmp.out}/lib"
   ] ++ stdenv.lib.optional stdenv.isDarwin [
     "--with-iconv-includes=${libiconv}/include" "--with-iconv-libraries=${libiconv}/lib"
-  ] ++
+  ] ++ stdenv.lib.optionals (targetPlatform.isDarwin && targetPlatform.isAarch64) [
     # 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";
+    "--disable-large-address-space"
+  ];
 
   # 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";
 
   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 $out/share/bash-completion/completions/${targetPrefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
@@ -70,7 +83,7 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs targetPrefix;
   };
 
   meta = {
diff --git a/pkgs/development/compilers/ghc/8.2.1-binary.nix b/pkgs/development/compilers/ghc/8.2.1-binary.nix
index 1242c6ae1b0..b3b5e2eceec 100644
--- a/pkgs/development/compilers/ghc/8.2.1-binary.nix
+++ b/pkgs/development/compilers/ghc/8.2.1-binary.nix
@@ -3,6 +3,9 @@
 , ncurses5, gmp, libiconv
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -151,6 +154,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin" "armv7l-linux" "aarch64-linux"];
 }
diff --git a/pkgs/development/compilers/ghc/8.2.2.nix b/pkgs/development/compilers/ghc/8.2.2.nix
index 736a6edc365..7ff172ff3b1 100644
--- a/pkgs/development/compilers/ghc/8.2.2.nix
+++ b/pkgs/development/compilers/ghc/8.2.2.nix
@@ -1,16 +1,29 @@
-{ 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, coreutils, fetchurl, perl, python3, sphinx
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be built 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 = "8.2.2";
 
+  # TODO(@Ericson2314) Make unconditional
+  targetPrefix = 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
@@ -50,28 +63,28 @@ 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";
 
   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 $out/share/bash-completion/completions/${targetPrefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
       test ! -h $i || continue
       egrep --quiet '^#!' <(head -n 1 $i) || continue
-      sed -i -e '2i export PATH="$PATH:${stdenv.lib.makeBinPath [ binutils coreutils ]}"' $i
+      sed -i -e '2i export PATH="$PATH:${stdenv.lib.makeBinPath [ targetPackages.stdenv.cc.bintools coreutils ]}"' $i
     done
   '';
 
   outputs = [ "out" "doc" ];
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs targetPrefix;
   } // stdenv.lib.optionalAttrs (targetPlatform != buildPlatform) {
     crossCompiler = selfPkgs.ghc.override {
       cross = targetPlatform;
@@ -94,24 +107,24 @@ in stdenv.mkDerivation (rec {
   '';
 
   configureFlags = [
-    "CC=${stdenv.ccCross}/bin/${cross.config}-cc"
-    "LD=${stdenv.binutils}/bin/${cross.config}-ld"
-    "AR=${stdenv.binutils}/bin/${cross.config}-ar"
-    "NM=${stdenv.binutils}/bin/${cross.config}-nm"
-    "RANLIB=${stdenv.binutils}/bin/${cross.config}-ranlib"
+    "CC=${stdenv.cc}/bin/${cross.config}-cc"
+    "LD=${stdenv.cc.bintools}/bin/${cross.config}-ld"
+    "AR=${stdenv.cc.bintools}/bin/${cross.config}-ar"
+    "NM=${stdenv.cc.bintools}/bin/${cross.config}-nm"
+    "RANLIB=${stdenv.cc.bintools}/bin/${cross.config}-ranlib"
     "--target=${cross.config}"
     "--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 ];
+  buildInputs = commonBuildInputs;
 
-  dontSetConfigureCross = true;
+  configurePlatforms = [];
 
   passthru = {
     inherit bootPkgs cross;
-    cc = "${stdenv.ccCross}/bin/${cross.config}-cc";
-    ld = "${stdenv.binutils}/bin/${cross.config}-ld";
+    cc = "${stdenv.cc}/bin/${cross.config}-cc";
+    ld = "${stdenv.cc}/bin/${cross.config}-ld";
   };
 })
diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 3f5dfa65958..00cf46abd52 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -1,20 +1,33 @@
-{ stdenv, lib, fetchgit, bootPkgs, perl, ncurses, libiconv, targetPackages, coreutils
-, autoconf, automake, happy, alex, python3, buildPlatform, targetPlatform
+{ 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
+, autoconf, automake, coreutils, fetchgit, perl, python3
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be built 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
+
 , version ? "8.5.20171209"
 }:
 
+assert !enableIntegerSimple -> gmp != null;
+
 let
   inherit (bootPkgs) ghc;
 
-  commonBuildInputs = [ ghc perl autoconf automake happy alex python3 ];
-
   rev = "4335c07ca7e64624819b22644d7591853826bd75";
 
+  # TODO(@Ericson2314) Make unconditional
+  targetPrefix = stdenv.lib.optionalString
+    (targetPlatform != hostPlatform)
+    "${targetPlatform.config}-";
+
+  commonBuildInputs = [ ghc perl autoconf automake happy alex python3 ];
   commonPreConfigure =  ''
     echo ${version} >VERSION
     echo ${rev} >GIT_COMMIT_ID
@@ -27,7 +40,8 @@ let
   '' + stdenv.lib.optionalString enableIntegerSimple ''
     echo "INTEGER_LIBRARY=integer-simple" > mk/build.mk
   '';
-in stdenv.mkDerivation (rec {
+in
+stdenv.mkDerivation (rec {
   inherit version rev;
   name = "ghc-${version}";
 
@@ -57,15 +71,15 @@ 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";
 
   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 $out/share/bash-completion/completions/${targetPrefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
@@ -78,7 +92,7 @@ in stdenv.mkDerivation (rec {
   outputs = [ "out" "doc" ];
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs targetPrefix;
   } // stdenv.lib.optionalAttrs (targetPlatform != buildPlatform) {
     crossCompiler = selfPkgs.ghc.override {
       cross = targetPlatform;
@@ -102,15 +116,15 @@ in stdenv.mkDerivation (rec {
 
   configureFlags = [
     "CC=${stdenv.cc}/bin/${cross.config}-cc"
-    "LD=${stdenv.cc}/bin/${cross.config}-ld"
-    "AR=${stdenv.cc}/bin/${cross.config}-ar"
-    "NM=${stdenv.cc}/bin/${cross.config}-nm"
-    "RANLIB=${stdenv.cc}/bin/${cross.config}-ranlib"
+    "LD=${stdenv.cc.bintools}/bin/${cross.config}-ld"
+    "AR=${stdenv.cc.bintools}/bin/${cross.config}-ar"
+    "NM=${stdenv.cc.bintools}/bin/${cross.config}-nm"
+    "RANLIB=${stdenv.cc.bintools}/bin/${cross.config}-ranlib"
     "--target=${cross.config}"
     "--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;
 
@@ -118,9 +132,7 @@ in stdenv.mkDerivation (rec {
 
   passthru = {
     inherit bootPkgs cross;
-
     cc = "${stdenv.cc}/bin/${cross.config}-cc";
-
     ld = "${stdenv.cc}/bin/${cross.config}-ld";
   };
 })