From 6b1057b452c55bb3b463f0d7055bc4ec3fd1f381 Mon Sep 17 00:00:00 2001
From: sternenseemann <0rpkxez4ksa01gb3typccl0i@systemli.org>
Date: Wed, 17 Feb 2021 18:02:09 +0100
Subject: [PATCH] ocamlPackages.uucp: use throw instead of lib.assertMsg

This makes the uucp evaluation fail silently for nix-env -qaP
ocaml-ng.ocamlPackages_4_02, as throw messages are not printed to
stderr.
---
 pkgs/development/ocaml-modules/uucp/default.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/ocaml-modules/uucp/default.nix b/pkgs/development/ocaml-modules/uucp/default.nix
index 433e3f9cb106..bb70ff6a4b7e 100644
--- a/pkgs/development/ocaml-modules/uucp/default.nix
+++ b/pkgs/development/ocaml-modules/uucp/default.nix
@@ -8,8 +8,9 @@ let
   doCheck = true;
 in
 
-assert lib.assertMsg (lib.versionAtLeast ocaml.version minimumOCamlVersion)
-  "${pname} needs at least OCaml ${minimumOCamlVersion}";
+if !(lib.versionAtLeast ocaml.version minimumOCamlVersion)
+then builtins.throw "${pname} needs at least OCaml ${minimumOCamlVersion}"
+else
 
 stdenv.mkDerivation {