diff --git a/scripts/lipo b/ios/scripts/lipo
similarity index 100%
rename from scripts/lipo
rename to ios/scripts/lipo
diff --git a/macos/scripts/lipo b/macos/scripts/lipo
new file mode 100755
index 0000000..9e32655
--- /dev/null
+++ b/macos/scripts/lipo
@@ -0,0 +1,15 @@
+#!/bin/sh
+# Workaround for NixOS/nixpkgs#405066: frameworks copied from the Nix store
+# stay read-only, so lipo can't write its temporary output file when Flutter
+# thins FlutterMacOS.framework during the build. Make the framework writable
+# before delegating to the real lipo.
+for arg in "$@"; do
+  case "$arg" in
+    */*.framework/*)
+      fw_dir="${arg%.framework/*}.framework"
+      chmod -R +w "$fw_dir" 2>/dev/null
+      ;;
+  esac
+done
+
+exec /usr/bin/lipo "$@"