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-rw-r--r--pkgs/development/ruby-modules/gem/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/development/ruby-modules/gem/default.nix b/pkgs/development/ruby-modules/gem/default.nix
index e5f9d045a5b..32bf8ed8207 100644
--- a/pkgs/development/ruby-modules/gem/default.nix
+++ b/pkgs/development/ruby-modules/gem/default.nix
@@ -250,6 +250,7 @@ stdenv.mkDerivation ((builtins.removeAttrs attrs ["source"]) // {
   meta = {
     # default to Ruby's platforms
     platforms = ruby.meta.platforms;
+    mainProgram = gemName;
   } // meta;
 })