diff --git a/pkgs/development/tools/impl/default.nix b/pkgs/development/tools/impl/default.nix
index c4f5ec41c4ad..c33389af05e5 100644
--- a/pkgs/development/tools/impl/default.nix
+++ b/pkgs/development/tools/impl/default.nix
@@ -2,20 +2,16 @@
 
 buildGoModule rec {
   pname = "impl";
-  version = "1.2.0";
+  version = "1.3.0";
 
   src = fetchFromGitHub {
     owner = "josharian";
     repo = "impl";
     rev = "v${version}";
-    hash = "sha256-BqRoLh0MpNQgY9OHHRBbegWGsq3Y4wOqg94rWvex76I=";
+    hash = "sha256-a9jAoZp/wVnTyaE4l2yWSf5aSxXEtqN6SoxU68XhRhk=";
   };
 
-  vendorHash = "sha256-+5+CM5iGV54zRa7rJoQDBWrO98icNxlAv8JwATynanY=";
-
-  preCheck = ''
-    export GOROOT="$(go env GOROOT)"
-  '';
+  vendorHash = "sha256-vTqDoM/LK5SHkayLKYig+tCrXLelOoILmQGCxlTWHog=";
 
   meta = with lib; {
     description = "Generate method stubs for implementing an interface";