1 files changed, 2 insertions, 2 deletions
diff --git a/pkgs/development/ocaml-modules/frontc/default.nix b/pkgs/development/ocaml-modules/frontc/default.nix
index 979c364e496b6..e68f6a28cb472 100644
--- a/pkgs/development/ocaml-modules/frontc/default.nix
+++ b/pkgs/development/ocaml-modules/frontc/default.nix
@@ -2,7 +2,7 @@
 
 let
   meta_file = fetchurl {
-    url = https://raw.githubusercontent.com/ocaml/opam-repository/3c191ae9356ca7b3b628f2707cfcb863db42480f/packages/FrontC/FrontC.3.4.1/files/META;
+    url = "https://raw.githubusercontent.com/ocaml/opam-repository/3c191ae9356ca7b3b628f2707cfcb863db42480f/packages/FrontC/FrontC.3.4.1/files/META";
     sha256 = "0s2wsinycldk8y5p09xd0hsgbhckhy7bkghzl63bph6mwv64kq2d";
   };
 in
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   };
 
   patches = [ (fetchpatch {
-      url = https://raw.githubusercontent.com/ocaml/opam-repository/3c191ae9356ca7b3b628f2707cfcb863db42480f/packages/FrontC/FrontC.3.4.1/files/opam.patch;
+      url = "https://raw.githubusercontent.com/ocaml/opam-repository/3c191ae9356ca7b3b628f2707cfcb863db42480f/packages/FrontC/FrontC.3.4.1/files/opam.patch";
       sha256 = "0v4f6740jbj1kxg1y03dzfa3x3gsrhv06wpzdj30gl4ki5fvj4hs";
     })
   ];