Error when running ant package in solr 7.2.1 from source

[C F]

I'm unable to run the ant package target in solr-7.2.1-src.tgz. Any ideas?
Is git required now?


$ ant package
Buildfile: /home/local/fred/solr-7.2.1/solr/build.xml

init-dist:

package-src-tgz:
     [exec] fatal: Not a git repository (or any parent up to mount point /)
     [exec] Stopping at filesystem boundary
(GIT_DISCOVERY_ACROSS_FILESYSTEM not set).

BUILD FAILED
/home/local/fred/solr-7.2.1/solr/build.xml:487: The following error
occurred while executing this line:
/home/local/fred/solr-7.2.1/lucene/common-build.xml:2305: exec returned: 128

Total time: 0 seconds

Thanks,
Carlton