pinning fix

pin.nix

-jsonpath :
+{
+  hostPkgs ? import <nixpkgs> {},
+  jsonpath
+}:
   let
-    hostPkgs = import <nixpkgs> {};
     pinnedVersion = hostPkgs.lib.importJSON jsonpath;
     pinnedPkgs = hostPkgs.fetchgit {
       inherit (pinnedVersion) url rev sha256;

pkgs/default.nix

 {
-  pkgs         ? import ../pin.nix ../nixpkgs-18.03.json,
-  datamovepkgs ? import ../pin.nix ../datamove.json,
+  hostPkgs ? import <nixpkgs> {},
+  pkgs         ? import ../pin.nix {
+    inherit hostPkgs;
+    jsonpath =../nixpkgs-18.03.json;
+  },
+  datamovepkgs ? import ../pin.nix {
+    inherit hostPkgs;
+    jsonpath=../datamove.json;
+  },
   packagepins ? import ./pins.nix {inherit (pkgs) stdenv fetchgit fetchgitPrivate;}
 }:
 let