buildx failed with: ERROR: failed to build: failed to solve: process "/bin/sh -c git clone https://github.com/ESCOMP/CTSM.git && cd CTSM && git checkout ${CTSM_VERSION} && ./bin/git-fleximod update" did not complete successfully: exit code: 127

Unexpected input(s) 'dockerfile', valid inputs are ['add-hosts', 'allow', 'annotations', 'attests', 'build-args', 'build-contexts', 'builder', 'cache-from', 'cache-to', 'call', 'cgroup-parent', 'context', 'file', 'labels', 'load', 'network', 'no-cache', 'no-cache-filters', 'outputs', 'platforms', 'provenance', 'pull', 'push', 'sbom', 'secrets', 'secret-envs', 'secret-files', 'shm-size', 'ssh', 'tags', 'target', 'ulimit', 'github-token']