diff --git a/lib/infra b/lib/infra
index cf003cce01..b983f2b739 100644
--- a/lib/infra
+++ b/lib/infra
@@ -29,7 +29,7 @@ GITDIR["pbr"]=$DEST/pbr
 # install_infra() - Collect source and prepare
 function install_infra {
     local PIP_VIRTUAL_ENV="$REQUIREMENTS_DIR/.venv"
-    [ ! -d $PIP_VIRTUAL_ENV ] && virtualenv $PIP_VIRTUAL_ENV
+    [ ! -d $PIP_VIRTUAL_ENV ] && ${VIRTUALENV_CMD} $PIP_VIRTUAL_ENV
     # We don't care about testing git pbr in the requirements venv.
     PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install -U pbr
     PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install $REQUIREMENTS_DIR