diff --git a/pkgs/os-specific/darwin/rewrite-tbd/default.nix b/pkgs/os-specific/darwin/rewrite-tbd/default.nix
new file mode 100644
index 00000000000..f41b81b3bc9
--- /dev/null
+++ b/pkgs/os-specific/darwin/rewrite-tbd/default.nix
@@ -0,0 +1,16 @@
+{ stdenv, fetchFromGitHub, cmake, pkg-config, libyaml }:
+
+stdenv.mkDerivation {
+  pname = "rewrite-tbd";
+  version = "20201114";
+
+  src = fetchFromGitHub {
+    owner = "thefloweringash";
+    repo = "rewrite-tbd";
+    rev = "988f29c6ccbca9b883966225263d8d78676da6a3";
+    sha256 = "08sk91zwj6n9x2ymwid2k7y0rwv5b7p6h1b25ipx1dv0i43p6v1a";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+  buildInputs = [ libyaml ];
+}
diff --git a/pkgs/top-level/darwin-packages.nix b/pkgs/top-level/darwin-packages.nix
index 212a1761e87..139d648629c 100644
--- a/pkgs/top-level/darwin-packages.nix
+++ b/pkgs/top-level/darwin-packages.nix
@@ -70,6 +70,8 @@ impure-cmds // apple-source-releases // {
 
   print-reexports = callPackage ../os-specific/darwin/print-reexports { };
 
+  rewrite-tbd = callPackage ../os-specific/darwin/rewrite-tbd { };
+
   checkReexportsHook = makeSetupHook {
     deps = [ pkgs.darwin.print-reexports ];
   } ../os-specific/darwin/print-reexports/setup-hook.sh;