nixos-unstable: network manager broken

[ghost]

Describe the bug
yqgd95bhk0gj886rpgi4p5hi61a0im8k-NetworkManager-fortisslvpn-1.2.10 fails to build.

To Reproduce

1. networking.networkmanager.enable = true;
2. sudo nixos-rebuild switch --upgrade

Expected behavior
NetworkManager to build.

Screenshots

checking for GLIB... no
configure: error: Package requirements (gio-unix-2.0 >= 2.32) were not met:

No package 'gio-unix-2.0' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables GLIB_CFLAGS
and GLIB_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
builder for '/nix/store/yqgd95bhk0gj886rpgi4p5hi61a0im8k-NetworkManager-fortisslvpn-1.2.10.drv' failed with exit code 1
cannot build derivation '/nix/store/111vzkld06vpalj5v70s6xzksczvfc6y-etc.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/9ab93hw3iv0ycd3j039ypk7v6nniflsp-system-path.drv': 1 dependencies couldn't be built
building '/nix/store/2glzig2fvpzvgihk2ar55m8mxl10f537-systemd-boot-builder.py.drv'...
building '/nix/store/i7mqk5yxpmi7dpr5lp1g4fv51yg9pbfa-udev-rules.drv'...
building '/nix/store/i91fgqdc93wfh16fkiv7im296k98k2i9-users-groups.json.drv'...
cannot build derivation '/nix/store/2kgwl509xl4gj7k4v3kj8vk667p5md2j-nixos-system-axius-20.09pre228622.029a5de0839.drv': 1 dependencies couldn't be built
error: build of '/nix/store/2kgwl509xl4gj7k4v3kj8vk667p5md2j-nixos-system-axius-20.09pre228622.029a5de0839.drv' failed

Additional context
Add any other context about the problem here.

Notify maintainers
@Phreedom
@domenkozar
@obadz
@worldofpeace

Metadata

• system: "x86_64-linux"
• host os: Linux 5.6.15, NixOS, 20.09pre227577.135073a87b7 (Nightingale)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.3.5
• channels(root): "nixos-20.09pre228622.029a5de0839"
• channels(josephtheengineer): "nixos-19.09pre186326.62cb4f72282"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute: NetworkManager-fortisslvpn
# a list of nixos modules affected by the problem
module:

[ghost]

Also, Removing networking.networkmanager.enable = true; from my config gets nixos-rebuild switch --upgrade working without any errors.

[jtojnar]

Thanks for reporting, pushed dc318b3 and 9b47854, which should fix that. We might need to apply similar fixes to other VPN plug-ins.