fix config

.github/workflows/build.yml

@@ -11,7 +11,9 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: "Check formatting"
-      run: "cargo fmt --all -- --check"
+      run: |
+      cargo install rustfmt
+      cargo fmt --all -- --check
 
     - name: Build
       run: |
@@ -33,7 +35,9 @@ jobs:
       run: brew cask install apenngrace/vulkan/vulkan-sdk
 
     - name: "Check formatting"
-      run: "cargo fmt --all -- --check"
+      run: |
+        cargo install rustfmt
+        cargo fmt --all -- --check
 
     - name: Build
       run: |
@@ -77,7 +81,9 @@ jobs:
         sudo apt-get install -y curl gnupg ca-certificates git gcc-multilib g++-multilib cmake libssl-dev pkg-config libfreetype6-dev libasound2-dev libexpat1-dev libxcb-composite0-dev libbz2-dev freeglut3-dev libxi-dev libsdl2-dev
 
     - name: "Check formatting"
-      run: "cargo fmt --all -- --check"
+      run: |
+        cargo install rustfmt
+        cargo fmt --all -- --check
 
     - name: Build
       run: |