Merge pull request #41461 from xplat/fix-opam-master

fix opam tool support

pkgs/development/tools/ocaml/opam/default.nix

@@ -71,8 +71,12 @@ in stdenv.mkDerivation rec {
   # Dirty, but apparently ocp-build requires a TERM
   makeFlags = ["TERM=screen"];
 
+  # change argv0 to "opam" as a workaround for
+  # https://github.com/ocaml/opam/issues/2142
   postInstall = ''
-    wrapProgram $out/bin/opam \
+    mv $out/bin/opam $out/bin/.opam-wrapped
+    makeWrapper $out/bin/.opam-wrapped $out/bin/opam \
+      --argv0 "opam" \
       --suffix PATH : ${aspcud}/bin:${unzip}/bin:${curl}/bin
   '';