diff --git a/nix/pkgs/heptapod-runner.nix b/nix/pkgs/heptapod-runner.nix
index f7740ad6f2..975a50f740 100644
--- a/nix/pkgs/heptapod-runner.nix
+++ b/nix/pkgs/heptapod-runner.nix
@@ -6,16 +6,20 @@ let
     rev = "b4fda456f403";
     sha256 = "1ybkd2jnq2dvkj157w2nlf9rmrgbd8kas43kimi9aarajgi9sri1";
   };
+  wrappedMercurial = pkgs.symlinkJoin {
+    name = pkgs.mercurial.name;
+    paths = [ pkgs.mercurial ];
+    postBuild = ''
+      mkdir -p "$out/etc/mercurial"
+      cp "${newSrc}/dockerfiles/build/runner.hgrc" "$out/etc/mercurial/hgrc"
+    '';
+  };
 in
 pkgs.gitlab-runner.overrideAttrs (oldAttrs: rec {
   inherit version;
-  buildInputs = [
-    (pkgs.mercurial.overrideAttrs (hgOldAttrs: rec {
-      postInstall = ''
-        mkdir -p "$out/etc/mercurial"
-        cp "${newSrc}/dockerfiles/build/runner.hgrc" "$out/etc/mercurial/hgrc"
-      '';
-    }))
-  ];
+  buildInputs = oldAttrs.buildInputs ++ [ wrappedMercurial pkgs.makeWrapper ];
   src = newSrc;
+  postInstall = ''
+    wrapProgram $bin/bin/gitlab-runner --prefix PATH : ${wrappedMercurial}
+  '';
 })