diff --git a/dockerfile/cosmos/Dockerfile b/dockerfile/cosmos/Dockerfile
index 4d20346..2cb0669 100644
--- a/dockerfile/cosmos/Dockerfile
+++ b/dockerfile/cosmos/Dockerfile
@@ -14,7 +14,7 @@ RUN if [ "${TARGETARCH}" = "arm64" ] && [ "${BUILDARCH}" != "arm64" ]; then\
 
 ARG CLONE_KEY
 
-RUN if [ ! -z "CLONE_KEY" ]; then\
+RUN if [ ! -z "${CLONE_KEY}" ]; then\
         mkdir -p ~/.ssh;\
         echo "${CLONE_KEY}" | base64 -d > ~/.ssh/id_ed25519;\
         chmod 600 ~/.ssh/id_ed25519;\
diff --git a/dockerfile/cosmos/native.Dockerfile b/dockerfile/cosmos/native.Dockerfile
index 11d9174..96c1f26 100644
--- a/dockerfile/cosmos/native.Dockerfile
+++ b/dockerfile/cosmos/native.Dockerfile
@@ -5,7 +5,7 @@ RUN apk add --update --no-cache curl make git libc-dev bash gcc linux-headers eu
 
 ARG CLONE_KEY
 
-RUN if [ ! -z "CLONE_KEY" ]; then\
+RUN if [ ! -z "${CLONE_KEY}" ]; then\
         mkdir -p ~/.ssh;\
         echo "${CLONE_KEY}" | base64 -d > ~/.ssh/id_ed25519;\
         chmod 600 ~/.ssh/id_ed25519;\