diff --git a/entrypoint.sh b/entrypoint.sh
index 5d4b270..3665443 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 
-SPEC=$1
-SYSTEM=$2
-ARCH=$3
+SPEC=${INPUT_SPEC}
+SYSTEM=${INPUT_SYSTEM}
+ARCH=${INPUT_ARCH}
 
 SPEC_NAME=$(basename ${SPEC})
 CONFIGURATION="${SYSTEM}-${ARCH}"