diff --git a/scripts/establish_conda_env.sh b/scripts/establish_conda_env.sh
index a253524028..8a8e90f7cc 100755
--- a/scripts/establish_conda_env.sh
+++ b/scripts/establish_conda_env.sh
@@ -107,7 +107,7 @@ function install_libraries()
     # conda-forge
     if [[ $ECE_VERBOSE == 0 ]]; then echo ... Installing libraries from conda-forge ...; fi
     if [[ $USE_MAMBA == TRUE ]]; then
-        local PRECOMMAND=`echo conda install -n ${RAVEN_LIBS_NAME} -y -c conda-forge $MAMBA_ECE_ADD`
+        local PRECOMMAND=`echo conda install -n ${RAVEN_LIBS_NAME} -y -c conda-forge $MAMBA_ECE_ADD $SET_PYTHON`
         if [[ $ECE_VERBOSE == 0 ]]; then echo ... conda-forge pre-command: ${PRECOMMAND}; fi
         ${PRECOMMAND}
         local COMMAND=`echo $($PYTHON_COMMAND ${RAVEN_LIB_HANDLER} ${INSTALL_OPTIONAL} ${OSOPTION} conda --action install --subset forge --no-name)`
@@ -178,7 +178,7 @@ function create_libraries()
         echo ... temporarily using Python $WORKING_PYTHON_COMMAND for installation
     fi
     if [[ $USE_MAMBA == TRUE ]]; then
-        local PRECOMMAND=`echo conda create -n ${RAVEN_LIBS_NAME} -y -c conda-forge $MAMBA_ECE_ADD`
+        local PRECOMMAND=`echo conda create -n ${RAVEN_LIBS_NAME} -y -c conda-forge $MAMBA_ECE_ADD $SET_PYTHON`
         if [[ $ECE_VERBOSE == 0 ]]; then echo ... conda-forge pre-command: $PRECOMMAND; fi
         ${PRECOMMAND}
         local COMMAND=`echo $($WORKING_PYTHON_COMMAND ${RAVEN_LIB_HANDLER} ${INSTALL_OPTIONAL} ${OSOPTION} conda --action install --subset forge --no-name)`
@@ -277,6 +277,9 @@ function display_usage()
 	echo '    --quiet'
 	echo '      Runs script with minimal output'
 	echo ''
+	echo '    --set-python'
+	echo '      Set python version in mamba setup (only used if use mamba flag is true)'
+	echo ''
 }
 
 function activate_env()
@@ -391,6 +394,10 @@ do
     --no-clean)
       ECE_CLEAN=1
       ;;
+    --set-python)
+      shift
+      SET_PYTHON=$1
+      ;;
   esac
   shift
 done