Update build.yml

Author: bnaras

.github/workflows/build.yml

@@ -35,13 +35,21 @@ jobs:
           - openblas
     steps:
       - uses: actions/checkout@v4
-      - run: brew install gcc@13      
-      - run: rustup toolchain install stable --profile=minimal
-      - run: cargo test --features=${{ matrix.feature }}
-        env:
-          CC: "$(brew --prefix gcc@13)/bin/gcc-13"
-          FC: "$(brew --prefix gcc@13)/bin/gfortran-13"
-          LIBRARY_PATH: "$(brew --prefix gcc@13)/lib/gcc/13"
+
+      - name: Install gcc@13 via Homebrew
+        run: brew install gcc@13
+
+      - name: Export gcc@13 environment variables
+        run: |
+          echo "CC=$(brew --prefix gcc@13)/bin/gcc-13" >> $GITHUB_ENV
+          echo "FC=$(brew --prefix gcc@13)/bin/gfortran-13" >> $GITHUB_ENV
+          echo "LIBRARY_PATH=$(brew --prefix gcc@13)/lib/gcc/13" >> $GITHUB_ENV
+
+      - name: Install Rust toolchain
+        run: rustup toolchain install stable --profile=minimal
+
+      - name: Run tests
+        run: cargo test --features=${{ matrix.feature }}
 
   test-ubuntu:
     runs-on: ubuntu-latest