diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2652b97..a139f97 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -230,7 +230,7 @@ jobs:
           fi
         elif test "$FC" = "lfortran" ; then
           echo "FPM_FC=lfortran" >> "$GITHUB_ENV"
-          echo "FFLAGS=--cpp --realloc-lhs-arrays $FFLAGS" >> "$GITHUB_ENV"
+          echo "FFLAGS=--cpp --realloc-lhs-arrays --separate-compilation $FFLAGS" >> "$GITHUB_ENV"
           echo "FPM_FLAGS=--profile debug --verbose" >> "$GITHUB_ENV" ; : fpm 0.13 workaround
         else
           echo "FPM_FC=gfortran-${COMPILER_VERSION}" >> "$GITHUB_ENV"