$ ccwl compile capture-output-file.scm > capture-output-file.cwl
$ cwltool capture-output-file.cwl --archive hello.tar --extractfile hello.txt
[workflow ] start
[workflow ] starting step extract-specific-file
[step extract-specific-file] start
[job extract-specific-file] /tmp/751nydd1$ tar \
    --extract \
    --file \
    /tmp/1zzw2n6m/stgc851e003-b5bd-437e-844b-311f6f66a7f1/hello.tar \
    hello.txt
[job extract-specific-file] completed success
[step extract-specific-file] completed success
[workflow ] completed success
{
    "extracted-file": {
        "location": "file:///home/manimekalai/hello.txt",
        "basename": "hello.txt",
        "class": "File",
        "checksum": "sha1$a0b65939670bc2c010f4d5d6a0b3e4e4590fb92b",
        "size": 13,
        "path": "/home/manimekalai/hello.txt"
    }
}
Final process status is success