Set RUSTFLAGS in workflow env

Author: jbearer

.github/workflows/build.yml

@@ -30,6 +30,8 @@ jobs:
           - --cfg async_executor_impl=\"tokio\" --cfg async_channel_impl=\"flume\"
     runs-on: ubuntu-latest
     timeout-minutes: 60
+    env:
+      RUSTFLAGS: ${{ matrix.flags }}
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
@@ -43,15 +45,15 @@ jobs:
 
       - name: Build
         run: |
-          RUSTFLAGS="${{ matrix.flags }}" cargo build --all-targets --workspace --release --features="logging-utils"
+          cargo build --all-targets --workspace --release --features="logging-utils"
 
       - name: Test
         run: |
-          RUSTFLAGS="${{ matrix.flags }}" cargo test --all-targets --workspace --release --features="logging-utils"
+          cargo test --all-targets --workspace --release --features="logging-utils"
 
       - name: Lint
         run: |
-          RUSTFLAGS="${{ matrix.flags }}" cargo clippy --workspace --all-targets --bins --tests --examples --features="logging-utils" -- -D warnings
+          cargo clippy --workspace --all-targets --bins --tests --examples --features="logging-utils" -- -D warnings
 
       - name: Check semver
         uses: obi1kenobi/cargo-semver-checks-action@v2