Issue description

I just wanted networkmanager to know my VPN configuration declaratively. I did this with the following expression:

environment.etc."ETH-VPN" = {
source = ./systemConfigFiles/networkManager/ETHZ-VPN;
target = "NetworkManager/system-connections/ETHZ VPN";
};

with this configuration I got nixos to crash and to create a non bootable generation

Steps to reproduce

when I rebuilded and switched (sudo nixos-rebuild --upgrade switch"), the switch (almost certainly) was completed, however I immediately droped into a login prompt (I guess X just died). Logging in is not possible, as the keyboard doesn't work (ctr+alt+sysrq + reisub) still works

when rebooting, I can choose the new generation. Doing that I, I get a lot of errormessages (see attached image).

My Guess: These errors relate to the fact that several files in /etc are broken.

Fix

When I remove the space in ETHZ VPN , everything works fine

Notes

The NetworkManager/system-connections/ directory already existed, there was even a different vpn in it.
There was no previous VPN with that name and also no file named NetworkManager/system-connections/ETHZ VPN existed.

I tried to create a minimal bug report by replacing these highly custom bug to a more generic one like this:

environment.etc."test" = {
source = ./foo;
target = "NetworkManager/spaced filename";
};

For some reason this doesn't create the same behaviour. It still generates a corrupted generation and switches into it, but it doesn't log me out. Instead various config files in /etc seem to be broken; E.g. when i do

sudo -s

I get /etc/sudoers: syntax error near line 1:
(and the same error for many other lines)

Technical details

Please run nix-shell -p nix-info --run "nix-info -m" and paste the
results.
these paths will be fetched (0.75 MiB download, 4.33 MiB unpacked):
/nix/store/5hszvi0hczzh25mmsz5rkb9qa758c10p-bash-4.4-p12-dev
/nix/store/9bkj2zjc8jdzwgwdwb5d890hrhrk9d3g-bash-4.4-p12-dev
/nix/store/bkx6rzqciq0sdn1z5liard33ffvv1n3s-bash-4.4-p12-doc
/nix/store/d5ki460cwwydf93f31is95sqpcf334r4-bash-4.4-p12-info
/nix/store/f1rp3j71id6g6zcmiafrksmw1cgydl9k-bash-4.4-p12-doc
/nix/store/l3nz0167a4xhb78ldcjns5p4dwvlm1cw-stdenv
copying path '/nix/store/bkx6rzqciq0sdn1z5liard33ffvv1n3s-bash-4.4-p12-doc' from 'https://cache.nixos.org'...
copying path '/nix/store/f1rp3j71id6g6zcmiafrksmw1cgydl9k-bash-4.4-p12-doc' from 'https://cache.nixos.org'...
copying path '/nix/store/d5ki460cwwydf93f31is95sqpcf334r4-bash-4.4-p12-info' from 'https://cache.nixos.org'...
copying path '/nix/store/5hszvi0hczzh25mmsz5rkb9qa758c10p-bash-4.4-p12-dev' from 'https://cache.nixos.org'...
copying path '/nix/store/9bkj2zjc8jdzwgwdwb5d890hrhrk9d3g-bash-4.4-p12-dev' from 'https://cache.nixos.org'...
copying path '/nix/store/l3nz0167a4xhb78ldcjns5p4dwvlm1cw-stdenv' from 'https://cache.nixos.org'...

• system: "x86_64-linux"
• host os: Linux 4.15.0, NixOS, 18.03.132535.2ee48415afc (Impala)
• multi-user?: yes
• sandbox: no
• version: nix-env (Nix) 2.0.2
• channels(root): "nixos-18.03"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs