Update msys2-build.yml

.github/workflows/msys2-build.yml

@@ -51,9 +51,16 @@ jobs:
 
     # Install xmake
     - name: Setup xmake
-      uses: xmake-io/github-action-setup-xmake@v1
-      with:
-        xmake-version: branch@dev
+      shell: msys2 {0}
+      run: |
+        git clone https://github.com/xmake-io/xmake.git --recurse-submodules -b dev
+        cd xmake
+        make build
+        make install PREFIX=${{ matrix.prefix }}
+        xmake --version
+        cd ..
+        git reset --hard HEAD
+        git clean -fdx
 
     # Update xmake repository (in order to have the file that will be cached)
     - name: Update xmake repository