diff --git a/env/merlin/sysconfigs/packages.yaml b/env/merlin/sysconfigs/packages.yaml
index c868efa..236842c 100644
--- a/env/merlin/sysconfigs/packages.yaml
+++ b/env/merlin/sysconfigs/packages.yaml
@@ -99,6 +99,11 @@ packages:
     externals:
       - prefix: /usr
         spec: groff@1.22.2
+  hcoll:
+    buildable: false
+    externals:
+      - prefix: /opt/mellanox/hcoll
+        spec: hcoll@3.9.1927
   fftw:
     buildable: false
     externals: