fix build.yaml

Author: romancardenas

.github/workflows/build.yaml

@@ -13,6 +13,9 @@ jobs:
       matrix:
         # All generated code should be running on stable now, MRSV is 1.59.0
         toolchain: [ stable, nightly, 1.60.0 ]
+        package: 
+          - riscv
+          - riscv-rt
         target:
           - riscv32i-unknown-none-elf
           - riscv32imc-unknown-none-elf
@@ -24,6 +27,10 @@ jobs:
           # Nightly is only for reference and allowed to fail
           - toolchain: nightly
             experimental: true
+          - package: riscv-rt
+            cargo_flags:
+              - "--features=s-mode"
+              - "--features=single-hart"
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.experimental || false }}
     steps:
@@ -33,7 +40,7 @@ jobs:
         toolchain: ${{ matrix.toolchain }}
         targets: ${{ matrix.target }}
     - name: Build library
-      run: cargo build --target ${{ matrix.target }} ${{ matrix.cargo_flags }}
+      run: cargo build --package ${{ matrix.package }} --target ${{ matrix.target }} ${{ matrix.cargo_flags }}
 
   # On MacOS, Ubuntu, and Windows, we at least make sure that the crate builds and links.
   build-others:
@@ -43,13 +50,15 @@ jobs:
           - macos-latest
           - ubuntu-latest
           - windows-latest
+        package: 
+          - riscv
         cargo_flags: [ "--no-default-features", "--all-features" ]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@stable
       - name: Build crate for host OS
-        run: cargo build ${{ matrix.cargo_flags }}
+        run: cargo build --package ${{ matrix.package }} ${{ matrix.cargo_flags }}
 
   # Job to check that all the builds succeeded
   build-check: