Put Cargo in PATH in all relevant sections

.github/workflows/CI.yml

@@ -51,22 +51,24 @@ jobs:
       if: contains( matrix.os, 'macos')
       run: |
         curl https://sh.rustup.rs -sSf | sh -s -- -y
-        export PATH="$HOME/.cargo/bin:$PATH"
-        which cargo
-        cargo
 
     - name: Install GFortran macOS
       if: contains( matrix.os, 'macos')
       run: brew install gcc@${GCC_V} || brew upgrade gcc@${GCC_V} || true
 
     - name: Build
-      run: cargo build --verbose
+      run: |
+        export PATH="$HOME/.cargo/bin:$PATH"
+        cargo build --verbose
 
     - name: Run tests
-      run: cargo test --verbose
+      run: |
+        export PATH="$HOME/.cargo/bin:$PATH"
+        cargo test --verbose
 
     # TODO: integrate these with `cargo test` above
     - name: Run manual tests
       run: |
+        export PATH="$HOME/.cargo/bin:$PATH"
         cargo run -- --help
         ./run_tests.sh