diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5bc32697..08324cae 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -345,6 +345,18 @@ jobs:
             ( echo ; set -x ; w=$(which $tool) ; ls -al $w ; ls -alhL $w ; $tool --version )
           fi
         done
+        if [[ ${{ matrix.compiler }} == flang ]] && false ; then
+          # Report any libflang_rt appearing in common places:
+          echo
+          if [ -n "${FC}" ] ; then
+            RDIR="$(${FC} -print-resource-dir)"
+          fi
+          if command -v brew ; then
+            BDIR="$(brew --prefix)"
+          fi
+          set -x
+          find $RDIR $BDIR /usr/lib/ -name '*flang_rt*' -exec ls -al {} \; | sort | uniq
+        fi
 
     - name: Build Caffeine (install.sh)
       run: |
@@ -413,6 +425,16 @@ jobs:
          ) ; \
         done
 
+    - name: Add Linux Brew to PATH
+      if: ${{ contains(matrix.os, 'ubuntu') && matrix.brew_via_install }}
+      run: |
+        set -x
+        # the first install.sh command established Linux Brew, so add it to the
+        # PATH to prevent pointless overwrites in the second install.sh below
+        HOMEBREW_PREFIX="/home/linuxbrew/.linuxbrew"
+        ( set +e ; ls -al ${HOMEBREW_PREFIX}/bin ; exit 0 )
+        echo "PATH=${HOMEBREW_PREFIX}/bin:${PATH}" >> "$GITHUB_ENV"
+
     - name: Build and Test Caffeine (thread-safe)
       run: |
         for var in FC CC CXX FFLAGS CPPFLAGS CFLAGS LDFLAGS LIBS GASNET_CONFIGURE_ARGS ; do \