Set CMAKE_PREFIX_PATH on a separate job step

Author: kvrigor

.github/workflows/CI.yml

@@ -108,7 +108,6 @@ jobs:
           cd util/make_dir
           echo "include ${GITHUB_WORKSPACE}/.github/build.oasis3-mct.ubuntu22.04" > make.inc
           make realclean static-libs -f TopMakefileOasis3
-          echo "CMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}:${OASIS_INSTALL_PREFIX}" >> $GITHUB_ENV
 
       - if: matrix.config.use_oasis == 'True' && steps.cache-oasis-restore.outputs.cache-hit != 'true'
         name: Cache OASIS3-MCT ${{ env.OASIS_TAG }}
@@ -117,6 +116,11 @@ jobs:
           path: ${{ env.OASIS_INSTALL_PREFIX }}
           key: cache-${{ matrix.config.name }}-${{ env.OASIS_TAG }}
 
+      - if: matrix.config.use_oasis == 'True'
+        name: Add OASIS to CMAKE_PREFIX_PATH
+        run: |
+          echo "CMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}:${OASIS_INSTALL_PREFIX}" >> $GITHUB_ENV
+
       #
       # pFUnit
       #
@@ -145,6 +149,10 @@ jobs:
           path: ${{ env.PFUNIT_INSTALL_PREFIX }}
           key: cache-${{ matrix.config.name }}-${{ env.PFUNIT_TAG }}
 
+      - name: Add pFUnit to CMAKE_PREFIX_PATH
+        run: |
+          echo "CMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}:${PFUNIT_INSTALL_PREFIX}" >> $GITHUB_ENV
+
       #
       # Configure, build, and install eCLM
       #