diff --git a/pkgs/development/tools/impl/default.nix b/pkgs/development/tools/impl/default.nix
index e5792d3137dd..bec08cb7e90c 100644
--- a/pkgs/development/tools/impl/default.nix
+++ b/pkgs/development/tools/impl/default.nix
@@ -2,16 +2,16 @@
 
 buildGoModule rec {
   pname = "impl";
-  version = "1.1.0";
+  version = "1.2.0";
 
   src = fetchFromGitHub {
     owner = "josharian";
     repo = "impl";
     rev = "v${version}";
-    sha256 = "sha256-OztQR1NusP7/FTm5kmuSSi1AC47DJFki7vVlPQIl6+8=";
+    hash = "sha256-BqRoLh0MpNQgY9OHHRBbegWGsq3Y4wOqg94rWvex76I=";
   };
 
-  vendorSha256 = "sha256-+5+CM5iGV54zRa7rJoQDBWrO98icNxlAv8JwATynanY=";
+  vendorHash = "sha256-+5+CM5iGV54zRa7rJoQDBWrO98icNxlAv8JwATynanY=";
 
   preCheck = ''
     export GOROOT="$(go env GOROOT)"