diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6216bc4c..19f2c0ca 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,9 +18,6 @@ env:
   # https://docs.github.com/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
   BUILD_CONFIGURATION: Release
 
-  # Path to the directory where the build artifacts will be placed.
-  PSQLODBC_OBJBASE: ${{ github.workspace }}/out/default
-
 permissions:
   contents: read
 
@@ -208,14 +205,10 @@ jobs:
       run: |
         copy .github\workflows\configuration.xml winbuild
         winbuild\BuildAll.ps1 -UseMimalloc
-      env:
-        PSQLODBC_OBJBASE: ${{ github.workspace }}/out/mimalloc
     - name: test psqlodbc with mimalloc
       shell: powershell
       run: |
         winbuild\regress.ps1 -DsnInfo "SERVER=localhost|DATABASE=contrib_regression|PORT=5432|UID=postgres|PWD=password" -ExpectMimalloc -ReinstallDriver
-      env:
-        PSQLODBC_OBJBASE: ${{ github.workspace }}/out/mimalloc
     - name: Upload x64 merge module
       uses: actions/upload-artifact@v4
       with: