diff --git a/.github/workflows/development.yml b/.github/workflows/development.yml
index bb54b9ec..62559fda 100644
--- a/.github/workflows/development.yml
+++ b/.github/workflows/development.yml
@@ -98,12 +98,11 @@ jobs:
           python-version: ${{ matrix.python }}
       - name: Install dependencies
         run: pip install toml loguru tox
-      - name: Set environment variables
-        run: |
-          echo "GUIDELLM_BUILD_TYPE=dev" >> $GITHUB_ENV
-          echo "GUIDELLM_BUILD_NUMBER=${{ github.event.pull_request.number }}" >> $GITHUB_ENV
       - name: Build the package
-        run: tox -e build
+        run: |
+          export GUIDELLM_BUILD_TYPE=dev
+          export GUIDELLM_BUILD_NUMBER=${{ github.event.pull_request.number }}
+          tox -e build
       - name: Upload build artifacts
         id: artifact-upload
         uses: actions/upload-artifact@v4
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 97a61d11..406cb295 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -67,12 +67,11 @@ jobs:
           python-version: ${{ matrix.python }}
       - name: Install dependencies
         run: pip install toml loguru tox
-      - name: Set environment variables
-        run: |
-          echo "GUIDELLM_BUILD_TYPE=nightly" >> $GITHUB_ENV
-          echo "GUIDELLM_BUILD_NUMBER=${{ github.run_number }}" >> $GITHUB_ENV
       - name: Build the package
-        run: tox -e build
+        run: |
+          export GUIDELLM_BUILD_TYPE=nightly
+          export GUIDELLM_BUILD_NUMBER=${{ github.run_number }}
+          tox -e build
       - name: Find wheel artifact
         id: find-asset-whl
         run: |
diff --git a/.github/workflows/release-candidate.yml b/.github/workflows/release-candidate.yml
index 9c740e54..c751701d 100644
--- a/.github/workflows/release-candidate.yml
+++ b/.github/workflows/release-candidate.yml
@@ -71,12 +71,11 @@ jobs:
           python-version: ${{ matrix.python }}
       - name: Install dependencies
         run: pip install toml loguru tox
-      - name: Set environment variables
-        run: |
-          echo "GUIDELLM_BUILD_TYPE=release_candidate" >> $GITHUB_ENV
-          echo "GUIDELLM_BUILD_NUMBER=${{ github.run_number }}" >> $GITHUB_ENV
       - name: Build the package
-        run: tox -e build
+        run: |
+          export GUIDELLM_BUILD_TYPE=release_candidate
+          export GUIDELLM_BUILD_NUMBER=${{ github.run_number }}
+          tox -e build
       - name: Upload build artifacts
         id: artifact-upload
         uses: actions/upload-artifact@v4
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 71e33316..fbc25279 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -19,12 +19,11 @@ jobs:
           python-version: ${{ matrix.python }}
       - name: Install dependencies
         run: pip install toml loguru tox
-      - name: Set environment variables
-        run: |
-          echo "GUIDELLM_BUILD_TYPE=release" >> $GITHUB_ENV
-          echo "GUIDELLM_BUILD_NUMBER=${{ github.run_number }}" >> $GITHUB_ENV
       - name: Build the package
-        run: tox -e build
+        run: |
+          export GUIDELLM_BUILD_TYPE=release
+          export GUIDELLM_BUILD_NUMBER=${{ github.run_number }}
+          tox -e build
       - name: Upload build artifacts
         id: artifact-upload
         uses: actions/upload-artifact@v4
diff --git a/tox.ini b/tox.ini
index 36e28090..d59f8caf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -69,6 +69,9 @@ deps =
     wheel
     loguru
     toml
+setenv =
+    GUIDELLM_BUILD_TYPE = {env:GUIDELLM_BUILD_TYPE:dev}
+    GUIDELLM_BUILD_NUMBER = {env:GUIDELLM_BUILD_NUMBER:0}
 commands =
     python utils/inject_build_props.py
     python -m build