diff --git a/functions b/functions
index 4e84600f0..5d1764dce 100644
--- a/functions
+++ b/functions
@@ -9,7 +9,7 @@
 # - ``SCRIPT_DIR`` must be set to script path
 # - ``GEM_BIN_DIR`` must be set to Gem bin directory
 install_external() {
-  PUPPETFILE=${SCRIPT_DIR}/Puppetfile1 ${GEM_BIN_DIR}r10k puppetfile install -v
+  PUPPETFILE=${SCRIPT_DIR}/Puppetfile1 r10k puppetfile install -v
 }
 
 # Install Puppet OpenStack modules with zuul-cloner
diff --git a/install_modules.sh b/install_modules.sh
index 2bb02f726..c48468e71 100755
--- a/install_modules.sh
+++ b/install_modules.sh
@@ -4,6 +4,7 @@ set -ex
 
 if [ -n "${GEM_HOME}" ]; then
     GEM_BIN_DIR=${GEM_HOME}/bin/
+    export PATH=${PATH}:${GEM_BIN_DIR}
 fi
 
 if [ "${PUPPET_MAJ_VERSION}" = 4 ]; then
diff --git a/install_modules_unit.sh b/install_modules_unit.sh
index 730cd41b2..6305224bd 100755
--- a/install_modules_unit.sh
+++ b/install_modules_unit.sh
@@ -8,6 +8,7 @@ set -ex
 
 if [ -n "${GEM_HOME}" ]; then
     GEM_BIN_DIR=${GEM_HOME}/bin/
+    export PATH=${PATH}:${GEM_BIN_DIR}
 fi
 
 if [ "${PUPPET_MAJ_VERSION}" = 4 ]; then