Error: stacker exited with code 1 stacker version v1.0.0-rc8-c75830e usernsexec-ing [u 0 1001 1 1 165537 65535 g 0 127 1 1 165537 65535 -- /opt/hostedtoolcache/stacker/1.0.0-rc8/x64/stacker --internal-userns --debug --stacker-dir .stacker recursive-build test/builds --stacker-file-pattern \\/stacker.yaml$ --layer-type tar --layer-type squashfs] stacker version v1.0.0-rc8-c75830e initializing stacker recipe: /home/runner/work/stacker-build-push-action/stacker-build-push-action/stacker.yaml substituting $STACKER_ROOTFS_DIR to /home/runner/work/stacker-build-push-action/stacker-build-push-action/roots substituting $STACKER_STACKER_DIR to /home/runner/work/stacker-build-push-action/stacker-build-push-action/.stacker substituting $STACKER_OCI_DIR to /home/runner/work/stacker-build-push-action/stacker-build-push-action/oci substituting $STACKER_WORK_DIR to error: no value for substitution IMAGE stackerbuild.io/stacker/pkg/types.substitute /stacker-tree/pkg/types/stackerfile.go:91 stackerbuild.io/stacker/pkg/types.NewStackerfile /stacker-tree/pkg/types/stackerfile.go:168 stackerbuild.io/stacker/pkg/types.NewStackerFiles /stacker-tree/pkg/types/stackerfiles.go:23 stackerbuild.io/stacker/pkg/stacker.(*Builder).BuildMultiple /stacker-tree/pkg/stacker/build.go:578 main.doRecursiveBuild /stacker-tree/cmd/stacker/recursive-build.go:71 github.com/urfave/cli/v2.(*Command).Run /build/gopath/pkg/mod/github.com/urfave/cli/v2@v2.25.0/command.go:273 github.com/urfave/cli/v2.(*Command).Run /build/gopath/pkg/mod/github.com/urfave/cli/v2@v2.25.0/command.go:266 github.com/urfave/cli/v2.(*App).RunContext /build/gopath/pkg/mod/github.com/urfave/cli/v2@v2.25.0/app.go:332 github.com/urfave/cli/v2.(*App).Run /build/gopath/pkg/mod/github.com/urfave/cli/v2@v2.25.0/app.go:309 main.main /stacker-tree/cmd/stacker/main.go:328 runtime.main /usr/lib/go/src/runtime/proc.go:267 runtime.goexit /usr/lib/go/src/runtime/asm_amd64.s:1650 error: exit status 1 stackerbuild.io/stacker/pkg/container.MaybeRunInNamespace /stacker-tree/pkg/container/userns.go:102 main.main.func3 /stacker-tree/cmd/stacker/main.go:323 github.com/urfave/cli/v2.(*Command).Run /build/gopath/pkg/mod/github.com/urfave/cli/v2@v2.25.0/command.go:213 github.com/urfave/cli/v2.(*App).RunContext /build/gopath/pkg/mod/github.com/urfave/cli/v2@v2.25.0/app.go:332 github.com/urfave/cli/v2.(*App).Run /build/gopath/pkg/mod/github.com/urfave/cli/v2@v2.25.0/app.go:309 main.main /stacker-tree/cmd/stacker/main.go:328 runtime.main /usr/lib/go/src/runtime/proc.go:267 runtime.goexit /usr/lib/go/src/runtime/asm_amd64.s:1650