diff --git a/Compiler/openmpi/build b/Compiler/openmpi/build
index f5a877f..ab246e9 100755
--- a/Compiler/openmpi/build
+++ b/Compiler/openmpi/build
@@ -22,10 +22,9 @@ pbuild::pre_configure() {
 	pbuild::add_configure_args "--enable-orterun-prefix-by-default"
 	pbuild::add_configure_args "--enable-shared"
 	pbuild::add_configure_args "--enable-static"
-	pbuild::add_configure_args "--with-sge=yes"
-       	pbuild::add_configure_args "--with-ucx"
        	pbuild::add_configure_args "--with-hwloc=internal"
 	pbuild::add_configure_args "--with-slurm=yes"
+	pbuild::add_configure_args "--with-ucx=${UCX_PREFIX}"
 
         if pbuild::use_flag slurm ; then
 		pbuild::add_configure_args "--with-pmi"
diff --git a/Compiler/openmpi/files/variants.rhel6 b/Compiler/openmpi/files/variants.rhel6
index 0f78053..8424455 100644
--- a/Compiler/openmpi/files/variants.rhel6
+++ b/Compiler/openmpi/files/variants.rhel6
@@ -43,3 +43,5 @@ openmpi/3.1.6	stable		gcc/{7.5.0,8.4.0,9.3.0,10.1.0}
 openmpi/4.0.0	stable		gcc/{5.5,6.4,6.5,7.3,7.4,8.2,8.3}.0
 
 openmpi/4.0.1   stable		gcc/7.4.0
+
+openmpi/4.0.5   unstable	gcc/{7.5.0,8.4.0,9.3.0,10.2.0} ucx/1.8.1