diff --git a/mbedtls-amis/builders.sh b/mbedtls-amis/builders.sh
old mode 100644
new mode 100755
index 95747b2..2dcd4e7
--- a/mbedtls-amis/builders.sh
+++ b/mbedtls-amis/builders.sh
@@ -1,11 +1,21 @@
 #!/bin/bash
 
+AMI=""
+[ ${BUILD_UBUNTU_AMI} == "true" ] && AMI="${AMI} ubuntu"
+[ ${BUILD_FREEBSD_AMI} == "true" ] && AMI="${AMI} freebsd"
+
+[ -z "${AMI}" ] && echo "Build Nothing.." && exit
+
 rm -rf mbedtls-amis
 git clone https://git.trustedfirmware.org/next/ci/mbedtls-amis.git
 cd mbedtls-amis
 
-# Dump packer_config.json to job log
-cat packer_config.json
-
-packer build packer_config.json
+for os in ${AMI}
+do
+    echo -e "\nBuild ${os} AMI"
+    [ ! -f "packer_${os}.json" ] && echo -e "\nERROR: Can not find packer_${os}.json" && exit -1
+    # Dump packer_config.json to job log
+    cat packer_${os}.json
+    packer build packer_${os}.json
+done