From fdf3aa99235b5497770bf7d1ba1d7d5e56ca44b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Wed, 23 Dec 2015 09:02:13 +0100
Subject: [PATCH] buildRubyGem: use a saner default version to fix #11805

Previously the gems defaulted to "ruby" as the name and
"${ruby-version}-${gem-name}-${gem-version}" as the version,
which was just insane.

https://github.com/NixOS/nixpkgs/issues/9771#issuecomment-141041414
Noone is reacting so it's high time to take at least some action.
/cc @cstrahan.
---
 pkgs/development/interpreters/ruby/gem.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/ruby/gem.nix b/pkgs/development/interpreters/ruby/gem.nix
index dd6338cd813d..bbc38226266b 100644
--- a/pkgs/development/interpreters/ruby/gem.nix
+++ b/pkgs/development/interpreters/ruby/gem.nix
@@ -6,7 +6,7 @@ lib.makeOverridable (
 , ruby ? defs.ruby
 , rubygems ? (rubygemsFun ruby)
 , stdenv ? ruby.stdenv
-, namePrefix ? "${ruby.name}" + "-"
+, namePrefix ? "${lib.replaceStrings ["-"] ["_"] ruby.name}" + "-"
 , buildInputs ? []
 , doCheck ? false
 , dontBuild ? true