From f3ea9d67a6c0a86ad6408a7359025e89e74e8f4e Mon Sep 17 00:00:00 2001
From: Erwan Leboucher <erwanleboucher@gmail.com>
Date: Sat, 8 Aug 2026 22:15:23 +0200
Subject: [PATCH] Fix macOS build on Nix-provided Flutter

---
 macos/Runner.xcodeproj/project.pbxproj |  4 ++--
 macos/scripts/lipo                     | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)
 create mode 100755 macos/scripts/lipo

diff --git a/macos/Runner.xcodeproj/project.pbxproj b/macos/Runner.xcodeproj/project.pbxproj
index 67876ad..3dbb24b 100644
--- a/macos/Runner.xcodeproj/project.pbxproj
+++ b/macos/Runner.xcodeproj/project.pbxproj
@@ -349,7 +349,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "echo \"$PRODUCT_NAME.app\" > \"$PROJECT_DIR\"/Flutter/ephemeral/.app_filename && \"$FLUTTER_ROOT\"/packages/flutter_tools/bin/macos_assemble.sh embed\n";
+			shellScript = "export PATH=\"$PROJECT_DIR/scripts:$PATH\"\necho \"$PRODUCT_NAME.app\" > \"$PROJECT_DIR\"/Flutter/ephemeral/.app_filename && \"$FLUTTER_ROOT\"/packages/flutter_tools/bin/macos_assemble.sh embed\n";
 		};
 		33CC111E2044C6BF0003C045 /* ShellScript */ = {
 			isa = PBXShellScriptBuildPhase;
@@ -369,7 +369,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"$FLUTTER_ROOT\"/packages/flutter_tools/bin/macos_assemble.sh && touch Flutter/ephemeral/tripwire";
+			shellScript = "export PATH=\"$PROJECT_DIR/scripts:$PATH\"\n\"$FLUTTER_ROOT\"/packages/flutter_tools/bin/macos_assemble.sh && touch Flutter/ephemeral/tripwire";
 		};
 		446C82D5FE82BD05F78EDA6A /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
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 "$@"