diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 2f815d8a5f18..3ef96ca41382 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -94,11 +94,9 @@ self: super: builtins.intersectAttrs super {
   # Won't find it's header files without help.
   sfml-audio = appendConfigureFlag super.sfml-audio "--extra-include-dirs=${pkgs.openal}/include/AL";
 
-  cachix = overrideCabal (addBuildTools (enableSeparateBinOutput super.cachix) [pkgs.boost]) (drv: {
-    postPatch = (drv.postPatch or "") + ''
-      substituteInPlace cachix.cabal --replace "c++14" "c++17"
-    '';
-  });
+  cachix = addBuildTools (enableSeparateBinOutput super.cachix) [pkgs.boost];
+
+  niv = enableSeparateBinOutput super.niv;
 
   ghcid = enableSeparateBinOutput super.ghcid;
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d333251dd4df..7d687145893c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10420,7 +10420,9 @@ in
 
   c-blosc = callPackage ../development/libraries/c-blosc { };
 
-  cachix = haskell.lib.justStaticExecutables haskellPackages.cachix;
+  cachix = haskellPackages.cachix.bin;
+
+  niv = haskellPackages.niv.bin;
 
   capnproto = callPackage ../development/libraries/capnproto { };