diff --git a/pkgs/shells/zsh/zsh-git-prompt/default.nix b/pkgs/shells/zsh/zsh-git-prompt/default.nix
index 7318da83d176..761ad071da95 100644
--- a/pkgs/shells/zsh/zsh-git-prompt/default.nix
+++ b/pkgs/shells/zsh/zsh-git-prompt/default.nix
@@ -29,10 +29,10 @@
 , python
 , git
 , lib
-, ghcVersion ? "ghc802"
+, haskellPackages
 }:
 
-haskell.packages.${ghcVersion}.callPackage
+haskellPackages.callPackage
   ({ mkDerivation, base, HUnit, parsec, process, QuickCheck, stdenv }:
    mkDerivation rec {
      pname = "zsh-git-prompt";