From 1fa9e7defbf570478a378edaace6bcd7a37ee8a1 Mon Sep 17 00:00:00 2001
From: James Deikun <james.deikun@obsidian.systems>
Date: Mon, 4 Jun 2018 15:22:07 -0400
Subject: [PATCH] fix opam tool support

---
 pkgs/development/tools/ocaml/opam/default.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/tools/ocaml/opam/default.nix b/pkgs/development/tools/ocaml/opam/default.nix
index 469e97e19de5..aa9feda985a3 100644
--- a/pkgs/development/tools/ocaml/opam/default.nix
+++ b/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
   '';