ctest.sh fails from within docker image running as non-root

lb lbcommand manpage
./lb: line 114: ./../man/man7/PSGraphics::matrix.7: Permission denied
./lb: line 114: ./../man/man7/Prototype::send.7: Permission denied
./lb: line 114: ./../man/man7/Prototype::override.7: Permission denied
./lb: line 114: ./../man/man7/Prototype::new.7: Permission denied
./lb: line 114: ./../man/man7/GhostScript::arcsin.7: Permission denied
./lb: line 114: ./../man/man7/GhostScript::arccos.7: Permission denied
./lb: line 114: ./../man/man7/Misc::SDS.7: Permission denied
./lb: line 114: ./../man/man7/Forth::drop.7: Permission denied
./lb: line 114: ./../man/man7/Forth::..7: Permission denied
./lb: line 114: ./../man/man7/Forth::.s.7: Permission denied
./lb: line 114: ./../man/man7/Forth::swap.7: Permission denied
./lb: line 114: ./../man/man7/Forth::over.7: Permission denied
./lb: line 114: ./../man/man7/Forth::rot.7: Permission denied
./lb: line 114: ./../man/man7/Forth::-rot.7: Permission denied
./lb: line 114: ./../man/man7/Forth::words.7: Permission denied
./lb: line 114: ./../man/man7/Forth::2dup.7: Permission denied
./lb: line 114: ./../man/man7/Forth::nip.7: Permission denied
./lb: line 114: ./../man/man7/Forth::min.7: Permission denied
id: cannot find name for user ID 1001
Extracting man pages from vocabulary PSGraphics
Extracting man pages from vocabulary Prototype
Extracting man pages from vocabulary GhostScript
Extracting man pages from vocabulary Misc
Extracting man pages from vocabulary Forth
...
No match for regular expression 'Processing manual pages under '