diff --git a/github-actions/pyfabm-ersem/pyfabm-ersem-build.sh b/github-actions/pyfabm-ersem/pyfabm-ersem-build.sh
index 9cb55f4..6443309 100755
--- a/github-actions/pyfabm-ersem/pyfabm-ersem-build.sh
+++ b/github-actions/pyfabm-ersem/pyfabm-ersem-build.sh
@@ -11,6 +11,7 @@ echo "Checking out branch: $BRANCH"
 cd ersem && git checkout $BRANCH && cd ..
 
 echo "Building PyFABM-ERSEM"
+mkdir install
 mkdir build && cd build
-cmake ../fabm/src/drivers/python -DFABM_ERSEM_BASE=../ersem
+cmake ../fabm/src/drivers/python -DFABM_ERSEM_BASE=../ersem -DCMAKE_INSTALL_PREFIX=../install
 make install