diff --git a/Dockerfile b/Dockerfile
index 477acee..3d76afe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -78,9 +78,11 @@ RUN set -e; \
   pacman-key --populate; \
   echo "installing bash"; \
   pacman -Sy --noconfirm bash; \
-  BASH_CMD="$(command -v bash 2>/dev/null|| true)"; \
-  [ -x "$BASH_CMD" ] && { rm -rf "/bin/sh" || true; } && ln -sf "$BASH_CMD" "/bin/sh" || true; \
-  [ -n "$BASH_CMD" ] && sed -i 's|root:x:.*|root:x:0:0:root:/root:'$BASH_CMD'|g' "/etc/passwd" || true
+  SH_CMD="$(which sh 2>/dev/null)"; \
+  BASH_CMD="$(which bash 2>/dev/null)"; \
+  [ -n "$BASH_CMD" ] && sed -i 's|root:x:.*|root:x:0:0:root:/root:'$BASH_CMD'|g' "/etc/passwd" || true; \
+  [ -x "$BASH_CMD" ] && [ "$SH_CMD" != "/bin/sh" ] && { rm -Rf "$SH_CMD";ln -s "$BASH_CMD" "$SH_CMD"; } || true; \
+  [ -x "$BASH_CMD" ] && [ ! -L "/bin/sh" ] && { rm -rf "/bin/sh" || true; } && ln -sf "$BASH_CMD" "/bin/sh" || true
 
 ENV SHELL="/bin/bash"
 SHELL [ "/bin/bash", "-c" ]