diff --git a/EESSI-pilot-install-software.sh b/EESSI-pilot-install-software.sh
index 803ac57554..bda939c57d 100755
--- a/EESSI-pilot-install-software.sh
+++ b/EESSI-pilot-install-software.sh
@@ -376,6 +376,12 @@ fail_msg="Installation of R failed, so sad..."
 $EB --from-pr 14821 X11-20210518-GCCcore-10.3.0.eb -r && $EB --from-pr 16011 R-4.1.0-foss-2021a.eb --robot --parallel-extensions-install --experimental
 check_exit_code $? "${ok_msg}" "${fail_msg}"
 
+echo ">> Installing OpenFOAM 9..."
+ok_msg="Yet another variant of OpenFOAM is installed!"
+fail_msg="Installation of OpenFOAM failed, yikes..."
+$EB --from-pr 16570 HarfBuzz-2.8.1-GCCcore-10.3.0.eb -r && eb --from-pr 16571 NSS-3.65-GCCcore-10.3.0.eb -r && $EB OpenFOAM-9-foss-2021a.eb -r
+check_exit_code $? "${ok_msg}" "${fail_msg}"
+
 echo ">> Installing Nextflow 22.10.1..."
 ok_msg="Nextflow installed, the work must flow..."
 fail_msg="Installation of Nextflow failed, that's unexpected..."
diff --git a/eessi-2021.12.yml b/eessi-2021.12.yml
index 210bbb2845..d66a9df056 100644
--- a/eessi-2021.12.yml
+++ b/eessi-2021.12.yml
@@ -25,6 +25,8 @@ software:
     toolchains:
       foss-2020a:
         versions: ['8', 'v2006']
+      foss-2021a:
+        versions: '9'
   OSU-Micro-Benchmarks:
      toolchains:
        gompi-2020a: