diff --git a/.github/workflows/code_formatting.yml b/.github/workflows/code_formatting.yml
index 2a7da52e26..8a18ca0345 100644
--- a/.github/workflows/code_formatting.yml
+++ b/.github/workflows/code_formatting.yml
@@ -13,8 +13,8 @@ jobs:
     - uses: actions/checkout@v5
     - uses: actions/setup-python@v6
     - name: Install packages
-      run: source tools/ci.sh && ci_c_code_formatting_setup
+      run: tools/ci.sh c_code_formatting_setup
     - name: Run code formatting
-      run: source tools/ci.sh && ci_c_code_formatting_run
+      run: tools/ci.sh c_code_formatting_run
     - name: Check code formatting
       run: git diff --exit-code
diff --git a/.github/workflows/code_size.yml b/.github/workflows/code_size.yml
index 8587ef0179..34bdf744cb 100644
--- a/.github/workflows/code_size.yml
+++ b/.github/workflows/code_size.yml
@@ -29,9 +29,9 @@ jobs:
       with:
         fetch-depth: 100
     - name: Install packages
-      run: source tools/ci.sh && ci_code_size_setup
+      run: tools/ci.sh code_size_setup
     - name: Build
-      run: source tools/ci.sh && ci_code_size_build
+      run: tools/ci.sh code_size_build
     - name: Compute code size difference
       run: tools/metrics.py diff ~/size0 ~/size1 | tee diff
     - name: Save PR number
diff --git a/.github/workflows/commit_formatting.yml b/.github/workflows/commit_formatting.yml
index 58ffb745b3..ca63fc796b 100644
--- a/.github/workflows/commit_formatting.yml
+++ b/.github/workflows/commit_formatting.yml
@@ -15,4 +15,4 @@ jobs:
         fetch-depth: 100
     - uses: actions/setup-python@v6
     - name: Check commit message formatting
-      run: source tools/ci.sh && ci_commit_formatting_run
+      run: tools/ci.sh commit_formatting_run
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 6a277a4a4f..aa05cfb138 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -22,6 +22,6 @@ jobs:
     - name: Install Python packages
       run: pip install -r docs/requirements.txt
     - name: Build unix port
-      run: source tools/ci.sh && ci_unix_build_helper
+      run: tools/ci.sh unix_build_helper
     - name: Build docs
       run: make -C docs/ html
diff --git a/.github/workflows/mpy_format.yml b/.github/workflows/mpy_format.yml
index 9d3cd139e6..e692a853e7 100644
--- a/.github/workflows/mpy_format.yml
+++ b/.github/workflows/mpy_format.yml
@@ -19,6 +19,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_mpy_format_setup
+      run: tools/ci.sh mpy_format_setup
     - name: Test mpy-tool.py
-      run: source tools/ci.sh && ci_mpy_format_test
+      run: tools/ci.sh mpy_format_test
diff --git a/.github/workflows/ports_alif.yml b/.github/workflows/ports_alif.yml
index a06b3f96ff..eea8f53900 100644
--- a/.github/workflows/ports_alif.yml
+++ b/.github/workflows/ports_alif.yml
@@ -28,6 +28,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_alif_setup
+      run: tools/ci.sh alif_setup
     - name: Build ci_${{matrix.ci_func }}
-      run: source tools/ci.sh && ci_${{ matrix.ci_func }}
+      run: tools/ci.sh ${{ matrix.ci_func }}
diff --git a/.github/workflows/ports_cc3200.yml b/.github/workflows/ports_cc3200.yml
index b60ff370da..c57309c23a 100644
--- a/.github/workflows/ports_cc3200.yml
+++ b/.github/workflows/ports_cc3200.yml
@@ -23,6 +23,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_cc3200_setup
+      run: tools/ci.sh cc3200_setup
     - name: Build
-      run: source tools/ci.sh && ci_cc3200_build
+      run: tools/ci.sh cc3200_build
diff --git a/.github/workflows/ports_esp32.yml b/.github/workflows/ports_esp32.yml
index c87552ade3..8ee3f44d6a 100644
--- a/.github/workflows/ports_esp32.yml
+++ b/.github/workflows/ports_esp32.yml
@@ -51,7 +51,7 @@ jobs:
 
     - name: Install ESP-IDF packages
       if: steps.cache_esp_idf.outputs.cache-hit != 'true'
-      run: source tools/ci.sh && ci_esp32_idf_setup
+      run: tools/ci.sh esp32_idf_setup
 
     - name: ccache
       uses: hendrikmuhs/ccache-action@v1.2
@@ -59,4 +59,4 @@ jobs:
         key: esp32-${{ matrix.ci_func }}
 
     - name: Build ci_${{matrix.ci_func }}
-      run: source tools/ci.sh && ci_${{ matrix.ci_func }}
+      run: tools/ci.sh ${{ matrix.ci_func }}
diff --git a/.github/workflows/ports_esp8266.yml b/.github/workflows/ports_esp8266.yml
index 3293abed59..96cf0c5a5c 100644
--- a/.github/workflows/ports_esp8266.yml
+++ b/.github/workflows/ports_esp8266.yml
@@ -23,6 +23,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_esp8266_setup && ci_esp8266_path >> $GITHUB_PATH
+      run: tools/ci.sh esp8266_setup && tools/ci.sh esp8266_path >> $GITHUB_PATH
     - name: Build
-      run: source tools/ci.sh && ci_esp8266_build
+      run: tools/ci.sh esp8266_build
diff --git a/.github/workflows/ports_mimxrt.yml b/.github/workflows/ports_mimxrt.yml
index ae9a80ec58..bcbaf3de06 100644
--- a/.github/workflows/ports_mimxrt.yml
+++ b/.github/workflows/ports_mimxrt.yml
@@ -28,6 +28,6 @@ jobs:
       with:
         path: 'micropython repo'
     - name: Install packages
-      run: source tools/ci.sh && ci_mimxrt_setup
+      run: tools/ci.sh mimxrt_setup
     - name: Build
-      run: source tools/ci.sh && ci_mimxrt_build
+      run: tools/ci.sh mimxrt_build
diff --git a/.github/workflows/ports_nrf.yml b/.github/workflows/ports_nrf.yml
index ce86617af0..995f65933e 100644
--- a/.github/workflows/ports_nrf.yml
+++ b/.github/workflows/ports_nrf.yml
@@ -23,6 +23,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_nrf_setup
+      run: tools/ci.sh nrf_setup
     - name: Build
-      run: source tools/ci.sh && ci_nrf_build
+      run: tools/ci.sh nrf_build
diff --git a/.github/workflows/ports_powerpc.yml b/.github/workflows/ports_powerpc.yml
index 81f71ca8a9..27417fb3c3 100644
--- a/.github/workflows/ports_powerpc.yml
+++ b/.github/workflows/ports_powerpc.yml
@@ -23,6 +23,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_powerpc_setup
+      run: tools/ci.sh powerpc_setup
     - name: Build
-      run: source tools/ci.sh && ci_powerpc_build
+      run: tools/ci.sh powerpc_build
diff --git a/.github/workflows/ports_qemu.yml b/.github/workflows/ports_qemu.yml
index cdecfae6c9..b038b03e71 100644
--- a/.github/workflows/ports_qemu.yml
+++ b/.github/workflows/ports_qemu.yml
@@ -32,9 +32,9 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_qemu_setup_arm
+      run: tools/ci.sh qemu_setup_arm
     - name: Build and run test suite ci_qemu_build_arm_${{ matrix.ci_func }}
-      run: source tools/ci.sh && ci_qemu_build_arm_${{ matrix.ci_func }}
+      run: tools/ci.sh qemu_build_arm_${{ matrix.ci_func }}
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -44,9 +44,9 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_qemu_setup_rv32
+      run: tools/ci.sh qemu_setup_rv32
     - name: Build and run test suite
-      run: source tools/ci.sh && ci_qemu_build_rv32
+      run: tools/ci.sh qemu_build_rv32
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -56,9 +56,9 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_qemu_setup_rv64
+      run: tools/ci.sh qemu_setup_rv64
     - name: Build and run test suite
-      run: source tools/ci.sh && ci_qemu_build_rv64
+      run: tools/ci.sh qemu_build_rv64
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
diff --git a/.github/workflows/ports_renesas-ra.yml b/.github/workflows/ports_renesas-ra.yml
index bf99ed25fe..600b8ea804 100644
--- a/.github/workflows/ports_renesas-ra.yml
+++ b/.github/workflows/ports_renesas-ra.yml
@@ -23,7 +23,7 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_renesas_ra_setup
+      run: tools/ci.sh renesas_ra_setup
     - name: Build
-      run: source tools/ci.sh && ci_renesas_ra_board_build
+      run: tools/ci.sh renesas_ra_board_build
 
diff --git a/.github/workflows/ports_rp2.yml b/.github/workflows/ports_rp2.yml
index 22d2a96880..0837c06c97 100644
--- a/.github/workflows/ports_rp2.yml
+++ b/.github/workflows/ports_rp2.yml
@@ -28,6 +28,6 @@ jobs:
       with:
         path: 'micropython repo'
     - name: Install packages
-      run: source tools/ci.sh && ci_rp2_setup
+      run: tools/ci.sh rp2_setup
     - name: Build
-      run: source tools/ci.sh && ci_rp2_build
+      run: tools/ci.sh rp2_build
diff --git a/.github/workflows/ports_samd.yml b/.github/workflows/ports_samd.yml
index dbea255c79..d159fde175 100644
--- a/.github/workflows/ports_samd.yml
+++ b/.github/workflows/ports_samd.yml
@@ -23,6 +23,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_samd_setup
+      run: tools/ci.sh samd_setup
     - name: Build
-      run: source tools/ci.sh && ci_samd_build
+      run: tools/ci.sh samd_build
diff --git a/.github/workflows/ports_stm32.yml b/.github/workflows/ports_stm32.yml
index 43659a5d5d..eae3bae871 100644
--- a/.github/workflows/ports_stm32.yml
+++ b/.github/workflows/ports_stm32.yml
@@ -30,7 +30,7 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_stm32_setup
+      run: tools/ci.sh stm32_setup
     - name: Build ci_${{matrix.ci_func }}
-      run: source tools/ci.sh && ci_${{ matrix.ci_func }}
+      run: tools/ci.sh ${{ matrix.ci_func }}
 
diff --git a/.github/workflows/ports_unix.yml b/.github/workflows/ports_unix.yml
index eeae895f6a..d406a912a4 100644
--- a/.github/workflows/ports_unix.yml
+++ b/.github/workflows/ports_unix.yml
@@ -25,9 +25,9 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Build
-      run: source tools/ci.sh && ci_unix_minimal_build
+      run: tools/ci.sh unix_minimal_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_minimal_run_tests
+      run: tools/ci.sh unix_minimal_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -37,7 +37,7 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Build with reproducible date
-      run: source tools/ci.sh && ci_unix_minimal_build
+      run: tools/ci.sh unix_minimal_build
       env:
         SOURCE_DATE_EPOCH: 1234567890
     - name: Check reproducible build date
@@ -48,9 +48,9 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Build
-      run: source tools/ci.sh && ci_unix_standard_build
+      run: tools/ci.sh unix_standard_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_standard_run_tests
+      run: tools/ci.sh unix_standard_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -60,9 +60,9 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Build
-      run: source tools/ci.sh && ci_unix_standard_v2_build
+      run: tools/ci.sh unix_standard_v2_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_standard_v2_run_tests
+      run: tools/ci.sh unix_standard_v2_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -77,17 +77,17 @@ jobs:
       with:
         python-version: '3.11'
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_coverage_setup
+      run: tools/ci.sh unix_coverage_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_coverage_build
+      run: tools/ci.sh unix_coverage_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_coverage_run_tests
+      run: tools/ci.sh unix_coverage_run_tests
     - name: Test merging .mpy files
-      run: source tools/ci.sh && ci_unix_coverage_run_mpy_merge_tests
+      run: tools/ci.sh unix_coverage_run_mpy_merge_tests
     - name: Build native mpy modules
-      run: source tools/ci.sh && ci_native_mpy_modules_build
+      run: tools/ci.sh native_mpy_modules_build
     - name: Test importing .mpy generated by mpy_ld.py
-      run: source tools/ci.sh && ci_unix_coverage_run_native_mpy_tests
+      run: tools/ci.sh unix_coverage_run_native_mpy_tests
     - name: Run gcov coverage analysis
       run: |
         (cd ports/unix && gcov -o build-coverage/py ../../py/*.c || true)
@@ -107,15 +107,15 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_32bit_setup
+      run: tools/ci.sh unix_32bit_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_coverage_32bit_build
+      run: tools/ci.sh unix_coverage_32bit_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_coverage_32bit_run_tests
+      run: tools/ci.sh unix_coverage_32bit_run_tests
     - name: Build native mpy modules
-      run: source tools/ci.sh && ci_native_mpy_modules_32bit_build
+      run: tools/ci.sh native_mpy_modules_32bit_build
     - name: Test importing .mpy generated by mpy_ld.py
-      run: source tools/ci.sh && ci_unix_coverage_32bit_run_native_mpy_tests
+      run: tools/ci.sh unix_coverage_32bit_run_native_mpy_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -125,11 +125,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_32bit_setup
+      run: tools/ci.sh unix_32bit_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_nanbox_build
+      run: tools/ci.sh unix_nanbox_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_nanbox_run_tests
+      run: tools/ci.sh unix_nanbox_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -139,11 +139,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_32bit_setup
+      run: tools/ci.sh unix_32bit_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_longlong_build
+      run: tools/ci.sh unix_longlong_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_longlong_run_tests
+      run: tools/ci.sh unix_longlong_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -153,9 +153,9 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Build
-      run: source tools/ci.sh && ci_unix_float_build
+      run: tools/ci.sh unix_float_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_float_run_tests
+      run: tools/ci.sh unix_float_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -165,9 +165,9 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Build
-      run: source tools/ci.sh && ci_unix_gil_enabled_build
+      run: tools/ci.sh unix_gil_enabled_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_gil_enabled_run_tests
+      run: tools/ci.sh unix_gil_enabled_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -177,11 +177,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_clang_setup
+      run: tools/ci.sh unix_clang_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_stackless_clang_build
+      run: tools/ci.sh unix_stackless_clang_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_stackless_clang_run_tests
+      run: tools/ci.sh unix_stackless_clang_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -191,11 +191,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_clang_setup
+      run: tools/ci.sh unix_clang_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_float_clang_build
+      run: tools/ci.sh unix_float_clang_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_float_clang_run_tests
+      run: tools/ci.sh unix_float_clang_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -210,9 +210,9 @@ jobs:
       with:
         python-version: '3.11'
     - name: Build
-      run: source tools/ci.sh && ci_unix_settrace_stackless_build
+      run: tools/ci.sh unix_settrace_stackless_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_settrace_stackless_run_tests
+      run: tools/ci.sh unix_settrace_stackless_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -222,11 +222,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_32bit_setup
+      run: tools/ci.sh unix_32bit_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_repr_b_build
+      run: tools/ci.sh unix_repr_b_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_repr_b_run_tests
+      run: tools/ci.sh unix_repr_b_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -239,9 +239,9 @@ jobs:
       with:
         python-version: '3.8'
     - name: Build
-      run: source tools/ci.sh && ci_unix_macos_build
+      run: tools/ci.sh unix_macos_build
     - name: Run tests
-      run: source tools/ci.sh && ci_unix_macos_run_tests
+      run: tools/ci.sh unix_macos_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -252,11 +252,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_qemu_mips_setup
+      run: tools/ci.sh unix_qemu_mips_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_qemu_mips_build
+      run: tools/ci.sh unix_qemu_mips_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_qemu_mips_run_tests
+      run: tools/ci.sh unix_qemu_mips_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -267,11 +267,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_qemu_arm_setup
+      run: tools/ci.sh unix_qemu_arm_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_qemu_arm_build
+      run: tools/ci.sh unix_qemu_arm_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_qemu_arm_run_tests
+      run: tools/ci.sh unix_qemu_arm_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -282,11 +282,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_qemu_riscv64_setup
+      run: tools/ci.sh unix_qemu_riscv64_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_qemu_riscv64_build
+      run: tools/ci.sh unix_qemu_riscv64_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_qemu_riscv64_run_tests
+      run: tools/ci.sh unix_qemu_riscv64_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -301,17 +301,17 @@ jobs:
       with:
         python-version: '3.11'
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_coverage_setup
+      run: tools/ci.sh unix_coverage_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_sanitize_address_build
+      run: tools/ci.sh unix_sanitize_address_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_sanitize_address_run_tests
+      run: tools/ci.sh unix_sanitize_address_run_tests
     - name: Test merging .mpy files
-      run: source tools/ci.sh && ci_unix_coverage_run_mpy_merge_tests
+      run: tools/ci.sh unix_coverage_run_mpy_merge_tests
     - name: Build native mpy modules
-      run: source tools/ci.sh && ci_native_mpy_modules_build
+      run: tools/ci.sh native_mpy_modules_build
     - name: Test importing .mpy generated by mpy_ld.py
-      run: source tools/ci.sh && ci_unix_coverage_run_native_mpy_tests
+      run: tools/ci.sh unix_coverage_run_native_mpy_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
@@ -326,17 +326,17 @@ jobs:
       with:
         python-version: '3.11'
     - name: Install packages
-      run: source tools/ci.sh && ci_unix_coverage_setup
+      run: tools/ci.sh unix_coverage_setup
     - name: Build
-      run: source tools/ci.sh && ci_unix_sanitize_undefined_build
+      run: tools/ci.sh unix_sanitize_undefined_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_unix_sanitize_undefined_run_tests
+      run: tools/ci.sh unix_sanitize_undefined_run_tests
     - name: Test merging .mpy files
-      run: source tools/ci.sh && ci_unix_coverage_run_mpy_merge_tests
+      run: tools/ci.sh unix_coverage_run_mpy_merge_tests
     - name: Build native mpy modules
-      run: source tools/ci.sh && ci_native_mpy_modules_build
+      run: tools/ci.sh native_mpy_modules_build
     - name: Test importing .mpy generated by mpy_ld.py
-      run: source tools/ci.sh && ci_unix_coverage_run_native_mpy_tests
+      run: tools/ci.sh unix_coverage_run_native_mpy_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
diff --git a/.github/workflows/ports_webassembly.yml b/.github/workflows/ports_webassembly.yml
index 14399950b5..6bfbb5aec6 100644
--- a/.github/workflows/ports_webassembly.yml
+++ b/.github/workflows/ports_webassembly.yml
@@ -23,11 +23,11 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_webassembly_setup
+      run: tools/ci.sh webassembly_setup
     - name: Build
-      run: source tools/ci.sh && ci_webassembly_build
+      run: tools/ci.sh webassembly_build
     - name: Run tests
-      run: source tools/ci.sh && ci_webassembly_run_tests
+      run: tools/ci.sh webassembly_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures
diff --git a/.github/workflows/ports_windows.yml b/.github/workflows/ports_windows.yml
index 16396f0fdd..e4e0152d3e 100644
--- a/.github/workflows/ports_windows.yml
+++ b/.github/workflows/ports_windows.yml
@@ -146,6 +146,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install packages
-      run: source tools/ci.sh && ci_windows_setup
+      run: tools/ci.sh windows_setup
     - name: Build
-      run: source tools/ci.sh && ci_windows_build
+      run: tools/ci.sh windows_build
diff --git a/.github/workflows/ports_zephyr.yml b/.github/workflows/ports_zephyr.yml
index 09ffd616b4..3ed164e2f5 100644
--- a/.github/workflows/ports_zephyr.yml
+++ b/.github/workflows/ports_zephyr.yml
@@ -52,14 +52,14 @@ jobs:
       with:
         key: zephyr
     - name: Install packages
-      run: source tools/ci.sh && ci_zephyr_setup
+      run: tools/ci.sh zephyr_setup
     - name: Install Zephyr
       if: steps.cache_workspace.outputs.cache-hit != 'true'
-      run: source tools/ci.sh && ci_zephyr_install
+      run: tools/ci.sh zephyr_install
     - name: Build
-      run: source tools/ci.sh && ci_zephyr_build
+      run: tools/ci.sh zephyr_build
     - name: Run main test suite
-      run: source tools/ci.sh && ci_zephyr_run_tests
+      run: tools/ci.sh zephyr_run_tests
     - name: Print failures
       if: failure()
       run: tests/run-tests.py --print-failures