diff --git a/pkgs/development/libraries/libproxy/default.nix b/pkgs/development/libraries/libproxy/default.nix
index 7aebff6f9a9e..62ddcd673900 100644
--- a/pkgs/development/libraries/libproxy/default.nix
+++ b/pkgs/development/libraries/libproxy/default.nix
@@ -1,5 +1,7 @@
-{ lib, stdenv
+{ lib
+, stdenv
 , fetchFromGitHub
+, fetchpatch
 , pkg-config
 , cmake
 , zlib
@@ -28,6 +30,14 @@ stdenv.mkDerivation rec {
     hash = "sha256-pqj1LwRdOK2CUu3hYIsogQIXxWzShDuKEbDTbtWkgnQ=";
   };
 
+  patches = lib.optionals stdenv.isDarwin [
+    # https://github.com/libproxy/libproxy/pull/189
+    (fetchpatch {
+      url = "https://github.com/libproxy/libproxy/commit/4331b9db427ce2c25ff5eeb597bec4bc35ed1a0b.patch";
+      sha256 = "sha256-uTh3rYVvEke1iWVHsT3Zj2H1F+gyLrffcmyt0JEKaCA=";
+    })
+  ];
+
   outputs = [ "out" "dev" "py3" ];
 
   nativeBuildInputs = [