diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 38f3e8b50c3c..3a63420f1218 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1473,8 +1473,6 @@ self: super: {
   # 2020-11-19: Jailbreaking until: https://github.com/snapframework/snap/pull/219
   snap = doJailbreak super.snap;
 
-  cachix = generateOptparseApplicativeCompletion "cachix" super.cachix;
-
   # 2020-11-23: Jailbreaking until: https://github.com/michaelt/text-pipes/pull/29
   pipes-text = doJailbreak super.pipes-text;
 
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 0e364a546faa..d997d1a8acb2 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -912,4 +912,6 @@ self: super: builtins.intersectAttrs super {
 
   rel8 = addTestToolDepend super.rel8 pkgs.postgresql;
 
+  cachix = generateOptparseApplicativeCompletion "cachix" super.cachix;
+
 }