diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index babcb4c864a..c5df56ef663 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -3177,7 +3177,7 @@ let
     pname = "Config-IniFiles";
     version = "3.000003";
     src = fetchurl {
-      url = mirror://cpan/authors/id/S/SH/SHLOMIF/Config-IniFiles-3.000003.tar.gz;
+      url = "mirror://cpan/authors/id/S/SH/SHLOMIF/Config-IniFiles-3.000003.tar.gz";
       sha256 = "3c457b65d98e5ff40bdb9cf814b0d5983eb0c53fb8696bda3ba035ad2acd6802";
     };
     propagatedBuildInputs = [ IOStringy ];