nix build does not contain dynamic library

[behrica]

after doing:

nix build  github:techascent/tmducken

and adding har to deps.end
I get error

 Unable to load library '/linux-x86-64/libduckdb.so':
   /linux-x86-64/libduckdb.so: cannot open shared object file: No such file or
   directory /linux-x86-64/libduckdb.so: cannot open shared object file: No such
   file or directory Native library (linux-x86-64/libduckdb.so) not found in
   resource path ([])

My jar does not contain andy libduckdb neither