diff --git a/pkgs/development/ocaml-modules/paf/cohttp.nix b/pkgs/development/ocaml-modules/paf/cohttp.nix
index df84083ccb3d..97396769fd05 100644
--- a/pkgs/development/ocaml-modules/paf/cohttp.nix
+++ b/pkgs/development/ocaml-modules/paf/cohttp.nix
@@ -47,6 +47,8 @@ buildDunePackage {
     astring
   ];
 
+  __darwinAllowLocalNetworking = true;
+
   meta = paf.meta // {
     description = "A CoHTTP client with its HTTP/AF implementation";
   };
diff --git a/pkgs/development/ocaml-modules/paf/default.nix b/pkgs/development/ocaml-modules/paf/default.nix
index acd16434f6ee..d172e73e13b2 100644
--- a/pkgs/development/ocaml-modules/paf/default.nix
+++ b/pkgs/development/ocaml-modules/paf/default.nix
@@ -61,6 +61,8 @@ buildDunePackage rec {
     alcotest-lwt
   ];
 
+  __darwinAllowLocalNetworking = true;
+
   meta = {
     description = "HTTP/AF and MirageOS";
     license = lib.licenses.mit;