diff --git a/pkgs/development/compilers/ghc/8.4.2.nix b/pkgs/development/compilers/ghc/8.4.2.nix
index a2c1a751bc3..9a57161d3a7 100644
--- a/pkgs/development/compilers/ghc/8.4.2.nix
+++ b/pkgs/development/compilers/ghc/8.4.2.nix
@@ -2,7 +2,7 @@
 , buildPlatform, hostPlatform, targetPlatform
 
 # build-tools
-, bootPkgs, alex, happy
+, bootPkgs, alex, happy, hscolour
 , autoconf, automake, coreutils, fetchurl, fetchpatch, perl, python3, m4
 
 , libffi, libiconv ? null, ncurses
@@ -152,7 +152,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     perl autoconf automake m4 python3
-    ghc alex happy
+    ghc alex happy hscolour
   ];
 
   # For building runtime libs
diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 0d9412761b3..4bc8fb671a2 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -2,7 +2,7 @@
 , buildPlatform, hostPlatform, targetPlatform
 
 # build-tools
-, bootPkgs, alex, happy
+, bootPkgs, alex, happy, hscolour
 , autoconf, automake, coreutils, fetchgit, perl, python3, m4
 
 , libffi, libiconv ? null, ncurses
@@ -150,7 +150,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     perl autoconf automake m4 python3
-    ghc alex happy
+    ghc alex happy hscolour
   ];
 
   # For building runtime libs
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index fab88ab180b..e95b5046355 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -69,13 +69,13 @@ in rec {
     };
     ghc842 = callPackage ../development/compilers/ghc/8.4.2.nix rec {
       bootPkgs = packages.ghc821Binary;
-      inherit (bootPkgs) alex happy;
+      inherit (bootPkgs) alex happy hscolour;
       buildLlvmPackages = buildPackages.llvmPackages_5;
       llvmPackages = pkgs.llvmPackages_5;
     };
     ghcHEAD = callPackage ../development/compilers/ghc/head.nix rec {
       bootPkgs = packages.ghc821Binary;
-      inherit (bootPkgs) alex happy;
+      inherit (bootPkgs) alex happy hscolour;
       buildLlvmPackages = buildPackages.llvmPackages_5;
       llvmPackages = pkgs.llvmPackages_5;
     };