nixpkgs/pkgs/development/interpreters/ruby/gem_hook.patch

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diff --git a/lib/rubygems/installer.rb b/lib/rubygems/installer.rb
index d1ef3cb..bf15652 100755
--- a/lib/rubygems/installer.rb
+++ b/lib/rubygems/installer.rb
@@ -545,6 +545,13 @@ Results logged to #{File.join(Dir.pwd, 'gem_make.out')}
say path if Gem.configuration.really_verbose
end
+
+ if !ENV['NIX_POST_EXTRACT_FILES_HOOK'].nil?
+ print "\nrunning NIX_POST_EXTRACT_FILES_HOOK #{ENV['NIX_POST_EXTRACT_FILES_HOOK']} #{@gem_dir}\n"
+ print `#{ENV['NIX_POST_EXTRACT_FILES_HOOK']} #{@gem_dir}`
+ print "\nrunning NIX_POST_EXTRACT_FILES_HOOK done\n"
+ end
+
end
##