diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 3442e873080..bd04ab7e6a8 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -42,6 +42,7 @@
 , installPhase ? "", preInstall ? "", postInstall ? ""
 , checkPhase ? "", preCheck ? "", postCheck ? ""
 , preFixup ? "", postFixup ? ""
+, shellHook ? ""
 , coreSetup ? false # Use only core packages to build Setup.hs.
 , useCpphs ? false
 } @ args:
@@ -279,6 +280,7 @@ stdenv.mkDerivation ({
         export NIX_${ghcCommandCaps}PKG="${ghcEnv}/bin/${ghcCommand}-pkg"
         export NIX_${ghcCommandCaps}_DOCDIR="${ghcEnv}/share/doc/ghc/html"
         export NIX_${ghcCommandCaps}_LIBDIR="${ghcEnv}/lib/${ghcEnv.name}"
+        ${shellHook}
       '';
     };