diff --git a/.github/workflows/ci-cd.yml b/.github/workflows/ci-cd.yml
index d3616c2b7..db754477e 100644
--- a/.github/workflows/ci-cd.yml
+++ b/.github/workflows/ci-cd.yml
@@ -64,6 +64,11 @@ jobs:
     - pre-setup
     runs-on: ubuntu-latest
     timeout-minutes: 1
+    outputs:
+      sdist-filename: >-
+        ${{ steps.dist-filenames-detection.outputs.sdist-filename }}
+      wheel-filename: >-
+        ${{ steps.dist-filenames-detection.outputs.wheel-filename }}
     steps:
     - name: Checkout project
       uses: actions/checkout@v4
@@ -78,17 +83,33 @@ jobs:
       env:
         PIP_CONSTRAINT: requirements/cython.txt
       run: python -Im build --config-setting=pure-python=true
+    - name: Determine actual created filenames
+      id: dist-filenames-detection
+      run: >
+        echo -n sdist-filename= >> "${GITHUB_OUTPUT}"
+
+
+        basename $(ls -1 dist/${{ needs.pre-setup.outputs.sdist-name }})
+        >> "${GITHUB_OUTPUT}"
+
+
+        echo -n wheel-filename= >> "${GITHUB_OUTPUT}"
+
+
+        basename $(ls -1 dist/${{ needs.pre-setup.outputs.wheel-name }})
+        >> "${GITHUB_OUTPUT}"
     - name: Upload built artifacts for testing
       uses: actions/upload-artifact@v3
       with:
+        if-no-files-found: error
         name: ${{ needs.pre-setup.outputs.dists-artifact-name  }}
         # NOTE: Exact expected file names are specified here
         # NOTE: as a safety measure — if anything weird ends
         # NOTE: up being in this dir or not all dists will be
         # NOTE: produced, this will fail the workflow.
         path: |
-          dist/${{ needs.pre-setup.outputs.sdist-name }}
-          dist/${{ needs.pre-setup.outputs.wheel-name }}
+          dist/${{ steps.dist-filenames-detection.outputs.sdist-filename }}
+          dist/${{ steps.dist-filenames-detection.outputs.wheel-filename }}
         retention-days: 15
 
   lint:
@@ -107,7 +128,7 @@ jobs:
     uses: ./.github/workflows/reusable-build-wheel.yml
     with:
       os: ${{ matrix.os }}
-      source-tarball-name: ${{ needs.pre-setup.outputs.sdist-name }}
+      source-tarball-name: ${{ needs.build-sdist.outputs.sdist-filename }}
       dists-artifact-name: ${{ needs.pre-setup.outputs.dists-artifact-name }}
       cython-tracing: >-  # Cython line tracing for coverage collection
         ${{
@@ -122,6 +143,7 @@ jobs:
   test:
     name: Test
     needs:
+    - build-sdist  # transitive, for accessing settings
     - build-wheels-for-tested-arches
     - pre-setup  # transitive, for accessing settings
     strategy:
@@ -152,7 +174,7 @@ jobs:
     - name: Retrieve the project source from an sdist inside the GHA artifact
       uses: re-actors/checkout-python-sdist@release/v1
       with:
-        source-tarball-name: ${{ needs.pre-setup.outputs.sdist-name }}
+        source-tarball-name: ${{ needs.build-sdist.outputs.sdist-filename }}
         workflow-artifact-name: >-
           ${{ needs.pre-setup.outputs.dists-artifact-name }}
     - name: Download distributions
@@ -324,7 +346,7 @@ jobs:
     uses: ./.github/workflows/reusable-build-wheel.yml
     with:
       qemu: ${{ matrix.qemu }}
-      source-tarball-name: ${{ needs.pre-setup.outputs.sdist-name }}
+      source-tarball-name: ${{ needs.build-sdist.outputs.sdist-filename }}
       dists-artifact-name: ${{ needs.pre-setup.outputs.dists-artifact-name }}
 
   deploy:
@@ -349,7 +371,7 @@ jobs:
     - name: Retrieve the project source from an sdist inside the GHA artifact
       uses: re-actors/checkout-python-sdist@release/v1
       with:
-        source-tarball-name: ${{ needs.pre-setup.outputs.sdist-name }}
+        source-tarball-name: ${{ needs.build-sdist.outputs.sdist-filename }}
         workflow-artifact-name: >-
           ${{ needs.pre-setup.outputs.dists-artifact-name }}
 
@@ -381,7 +403,7 @@ jobs:
       uses: sigstore/gh-action-sigstore-python@v2.1.0
       with:
         inputs: >-
-          ./dist/${{ needs.pre-setup.outputs.sdist-name }}
+          ./dist/${{ needs.build-sdist.outputs.sdist-filename }}
           ./dist/*.whl
 
     - name: Upload artifact signatures to GitHub Release
diff --git a/.github/workflows/reusable-build-wheel.yml b/.github/workflows/reusable-build-wheel.yml
index 8d194aae6..5a30348e2 100644
--- a/.github/workflows/reusable-build-wheel.yml
+++ b/.github/workflows/reusable-build-wheel.yml
@@ -42,11 +42,11 @@ jobs:
     # Ref: https://github.com/python-jsonschema/check-jsonschema/issues/354
     timeout-minutes: 60  # FIXME: ${{ inputs.qemu && '60' || '20' }}
     steps:
-    - name: Retrieve the project source from an sdist inside the GHA artifact
-      uses: re-actors/checkout-python-sdist@release/v1
+    - name: Download distributions
+      uses: actions/download-artifact@v3
       with:
-        source-tarball-name: ${{ inputs.source-tarball-name }}
-        workflow-artifact-name: ${{ inputs.dists-artifact-name }}
+        name: ${{ inputs.dists-artifact-name }}
+        path: .tmp-dists
 
     - name: Set up QEMU
       if: inputs.qemu
@@ -72,6 +72,8 @@ jobs:
         CIBW_CONFIG_SETTINGS: >-  # Cython line tracing for coverage collection
           pure-python=false
           with-cython-tracing=${{ inputs.cython-tracing }}
+      with:
+        package-dir: .tmp-dists/${{ inputs.source-tarball-name }}
 
     - name: Upload built artifacts for testing and publishing
       uses: actions/upload-artifact@v3
diff --git a/pyproject.toml b/pyproject.toml
index 9d5f3d98a..462e35ce1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -82,7 +82,7 @@ skip = "pp*"
 COLOR = "yes"
 FORCE_COLOR = "1"
 MYPY_FORCE_COLOR = "1"
-PIP_CONSTRAINT = "requirements/cython.txt"
+PIP_CONSTRAINT = "{project}/requirements/cython.txt"
 PRE_COMMIT_COLOR = "always"
 PY_COLORS = "1"