Enable Linux desktop builds in CI

Author: wmioch

.github/workflows/flutter-ci.yml

@@ -41,6 +41,9 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y clang cmake ninja-build pkg-config libgtk-3-dev liblzma-dev
 
+      - name: Enable Linux desktop support
+        run: flutter config --enable-linux-desktop
+
       - name: Fetch packages
         run: flutter pub get
 

scripts/flutter_env.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 # Helper to expose the preinstalled Flutter and Android SDK toolchains in this container.
-export FLUTTER_HOME=${FLUTTER_HOME:-/opt/flutter}
+export FLUTTER_HOME=${FLUTTER_HOME:-/opt/flutter/flutter}
 export ANDROID_SDK_ROOT=${ANDROID_SDK_ROOT:-/opt/android-sdk}
 export PATH="$FLUTTER_HOME/bin:$ANDROID_SDK_ROOT/platform-tools:$ANDROID_SDK_ROOT/cmdline-tools/latest/bin:$PATH"