$ echo "$NP_LOCATION"
/home/User/Files/Subdirectory With Spaces In Name/MoreFiles/Project
$ ./nix-portable nix-shell ./shell.nix
./nix-portable: line 42: test: /home/User/Files/Subdirectory
/home/User/Files/Subdirectory With Spaces In Name/MoreFiles/Project/.nix-portable/busybox/bin/busybox: No such file or directory