The current github holder inherited it from the original author, but there's little to no activity on the project it would appear.
I ran into issues actually importing packages after a fresh install; I have tried to debug the issue, but seem to have hit a wall.
I think I narrowed down the failure to: running ⎕EC (execute controlled) on each line of the package's source code file(s) in boot/gnu-apl-linux.apl::pkg⍙import_apl, lines 142-143.
I added some debugging, and the file reading logic seems otherwise to be working fine; however as it reads in the package source, any valid APL statements other than other than ⍝comments and 'literal strings' cause ⎕EC to return 0 (error).
This package manager looks to have potential, but it could use some love from maintainers with more experience than myself :).
It would be great if we could get this fixed, since APL-Pkg project is mentioned on the GNU APL page ...
-Russ