diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 18e24d5a31e..de9d06f7ce0 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -536,7 +536,7 @@ in
     dontBuild = false;
     postPatch = ''
       substituteInPlace lib/rbreadline.rb \
-        --replace 'infocmp' '${ncurses.dev}/bin/infocmp'
+        --replace 'infocmp' '${ncurses}/bin/infocmp'
     '';
   };