For the moment it doesn't work without tinkering on nix because the binary tresorit is trying to write in its current directory (and nix store is rw). Currently, there are no options to change this:
strace tresorit :
mkdir("/nix/store/0qrdl9f7qpk4vfk3j854vri941jccw1z-tresorit-3.5.698.875/bin/Logs/", 0777) = -1 EROFS (Read-only file system)
or
openat(AT_FDCWD, "/nix/store/0qrdl9f7qpk4vfk3j854vri941jccw1z-tresorit-3.5.698.875/bin/running.pid", O_RDWR|O_CREAT|O_EXCL|O_CLOEXEC, 0666) = -1 EROFS (Read-only file system)
nix run -f release.nix -c install-impure-tresorit
This install tresorit in your $HOME/.local/tresorit (as does the tresorit installation script)
or
nix-env -if release.nix -A impure
and you can use
tresorit-impure
# or
tresorit-cli-impure