diff --git a/pkgs/tools/package-management/nix-pin/default.nix b/pkgs/tools/package-management/nix-pin/default.nix
index e2c18f33d61..c12b82a61e1 100644
--- a/pkgs/tools/package-management/nix-pin/default.nix
+++ b/pkgs/tools/package-management/nix-pin/default.nix
@@ -1,12 +1,12 @@
 { pkgs, stdenv, fetchFromGitHub, mypy, python3 }:
 let self = stdenv.mkDerivation rec {
   name = "nix-pin-${version}";
-  version = "0.2.2";
+  version = "0.1.2";
   src = fetchFromGitHub {
     owner = "timbertson";
     repo = "nix-pin";
-    rev = "version-0.2.2";
-    sha256 = "1kw43kzy4m6lnnif51r2a8i4vcgr7d4vqb1c75p7pk2b9y3jwxsz";
+    rev = "version-0.1.2";
+    sha256 = "1zwfb5198qzbjwivgiaxbwva9frgrrqaj92nw8vz95yi08pijssh";
   };
   buildInputs = [ python3 mypy ];
   buildPhase = ''
@@ -16,11 +16,12 @@ let self = stdenv.mkDerivation rec {
     mkdir "$out"
     cp -r bin share "$out"
   '';
-  passthru =
-    let api = import "${self}/share/nix/api.nix" { inherit pkgs; }; in
-    {
-      inherit (api) augmentedPkgs pins callPackage;
-    };
+  passthru = {
+    callWithPins = path: args:
+      import "${self}/share/nix/call.nix" {
+        inherit pkgs path args;
+      };
+  };
   meta = with stdenv.lib; {
     homepage = "https://github.com/timbertson/nix-pin";
     description = "nixpkgs development utility";