diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 709bdec..24d4a00 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,23 +23,23 @@ jobs:
       fail-fast: false
       matrix:
         arch:
-        #  - { name: i686, alt: x86 }
-        #  - { name: x86_64, alt: amd64 }
-        #  - { name: aarch64, alt: arm64 }
+          - { name: i686, alt: x86 }
+          - { name: x86_64, alt: amd64 }
+          - { name: aarch64, alt: arm64 }
           - { name: powerpc, alt: powerpc }
-        #  - { name: powerpc64, alt: powerpc64 }
-        #  - { name: riscv32, alt: riscv }
-        #  - { name: riscv64, alt: riscv }
-        #  - { name: mips, alt: mips }
-        #  - { name: m68k, alt: m68k }
+          - { name: powerpc64, alt: powerpc64 }
+          - { name: riscv32, alt: riscv }
+          - { name: riscv64, alt: riscv }
+          - { name: mips, alt: mips }
+          - { name: m68k, alt: m68k }
         libc: [ gnu, musl ]
         include:
-        #  - { arch: { name: mips64, alt: mips }, libc: gnuabi64 }
-        #  - { arch: { name: mips64, alt: mips }, libc: musl }
+          - { arch: { name: mips64, alt: mips }, libc: gnuabi64 }
+          - { arch: { name: mips64, alt: mips }, libc: musl }
         #  - { arch: { name: arm, alt: arm }, libc: gnueabihf }
           - { arch: { name: armv7l, alt: arm }, libc: musleabihf }
-        #exclude:
-        #  - { arch: { name: riscv32, alt: riscv }, libc: gnu }
+        exclude:
+          - { arch: { name: riscv32, alt: riscv }, libc: gnu }
 
     runs-on: ubuntu-latest
 
@@ -52,23 +52,20 @@ jobs:
           path: mlton
 
       - name: Checkout musl-cross-make
-        if: startsWith(matrix.libc, 'musl')
+        if: startsWith(matrix.libc, 'musl') && false
         uses: actions/checkout@v4
         with:
           repository: richfelker/musl-cross-make
           ref: master
           path: musl-cross-make
 
-      - name: ls
-        run: ls -l
-
       - name: Install qemu
         run: |
           sudo apt-get update
           sudo apt-get install qemu-user-static
 
-      - name: Install toolchain (musl.cc)
-        if: ${{ startsWith(matrix.libc, 'musl') && false }}
+      - name: Install toolchain (musl)
+        if: startsWith(matrix.libc, 'musl')
         run: |
           curl -sOL https://more.musl.cc/x86_64-linux-musl/${{ matrix.arch.name }}-linux-${{ matrix.libc }}-cross.tgz
           tar -xf ${{ matrix.arch.name }}-linux-${{ matrix.libc }}-cross.tgz
@@ -76,8 +73,8 @@ jobs:
           rm -r ${{ matrix.arch.name }}-linux-${{ matrix.libc }}-cross \
                 ${{ matrix.arch.name }}-linux-${{ matrix.libc }}-cross.tgz
 
-      - name: Install toolchain (musl)
-        if: startsWith(matrix.libc, 'musl')
+      - name: Build toolchain (musl)
+        if: startsWith(matrix.libc, 'musl') && false
         run: |
           cd musl-cross-make
           cat <<EOF > config.mak
@@ -94,13 +91,13 @@ jobs:
           sudo make install
 
       - name: Install toolchain (glibc)
-        if: ${{ startsWith(matrix.libc, 'gnu') && matrix.arch.name != 'x86_64' }}
+        if: startsWith(matrix.libc, 'gnu') && matrix.arch.name != 'x86_64'
         run: |
           sudo apt-get install gcc-${{ matrix.arch.name }}-linux-${{ matrix.libc }} \
                                binutils-${{ matrix.arch.name }}-linux-${{ matrix.libc }}
 
       - name: Link cc to gcc
-        if: ${{ startsWith(matrix.libc, 'gnu') }}
+        if: startsWith(matrix.libc, 'gnu')
         run: |
           sudo ln -s /usr/bin/${{ matrix.arch.name }}-linux-${{ matrix.libc }}-gcc \
                      /usr/bin/${{ matrix.arch.name }}-linux-${{ matrix.libc }}-cc
@@ -132,7 +129,7 @@ jobs:
           sudo cp -p mlton/runtime/platform/linux.h /opt/boot/lib/mlton/include/platform/linux.h
 
       - name: Build target runtime (old)
-        if: ${{ false }}
+        if: false
         run: |
           curl -sOL https://github.com/MLton/mlton/releases/download/on-20210117-release/mlton-20210117.src.tgz
           tar xzf mlton-20210117.src.tgz
@@ -148,7 +145,7 @@ jobs:
           sudo cp -fpR src/build/lib/mlton/targets/${{ matrix.arch.name }}-linux-${{ matrix.libc }} /opt/boot/lib/mlton/targets/
 
       - name: Build target runtime (new)
-        if: ${{ true }}
+        if: true
         run: |
           cd mlton
           PATH="/opt/boot/bin:$PATH" make \
@@ -177,6 +174,7 @@ jobs:
           build/bin/mlton -show path-map
 
       - name: Limit tests
+        if: false
         run: |
           cd mlton
           mv regression/real.sml .