diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index d702b6c69fe..d610242f29b 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -4864,7 +4864,7 @@ let
     pname = "DateTime";
     version = "1.52";
     src = fetchurl {
-      url = mirror://cpan/authors/id/D/DR/DROLSKY/DateTime-1.52.tar.gz;
+      url = "mirror://cpan/authors/id/D/DR/DROLSKY/DateTime-1.52.tar.gz";
       sha256 = "1z1xpifh2kpyw7rlc8ivg9rl0qmabjq979gjp0s9agdjf9hqp0k7";
     };
     buildInputs = [ CPANMetaCheck TestFatal TestWarnings ];