Hi,
AFAIK, the only way to correct this is going to the actual code, as it seems is hard-wired. The Galaxy team should take a more detailed look.
There are at least 4 other issues related to this specific bug of “@” in paths here at Galaxy Help:
this first one is about maker too (V 2.31.10):
Possible unintended interpolation of @2 in string at /media/vol2/home/galaxy/galaxy/database/dependencies/_conda/envs/__maker@2.31.10/bin/../lib/5.26.2/x86_64-linux-thread-multi/Config_heavy.pl line 260.
Possible precedence issue with control flow operator at /media/vol2/home/galaxy/galaxy/database/dependencies/_conda/envs/__maker@2.31.10/lib/site_perl/5.26.2/Bio/DB/IndexedBase.pm line 805.
error: executing task of job 1007802 failed: execution daemon on host "node11" didn't accept task