For whatever reason, setting `configureFlagsArray` causes
the configure invocation to escape spaces between parameters:
configure flags: --disable-static --disable-dependency-tracking --prefix=/nix/store/4bn8dsr743dp0g5j020jf8why5hkld3p-lightdm-gtk-greeter-2.0.6 --localstatedir=/var\ --sysconfdir=/etc\ --disable-indicator-services-command\ --enable-at-spi-command=/nix/store/li9bsxl8qja8qw0pa70xd572gw5hqsdm-at-spi2-core-2.30.1/libexec/at-spi-bus-launcher\ \ --launch-immediately
This actually doesn't break the build (!) but it does break
lightdm pretty badly for me and it's not hard to imagine why :).
Instead, use configureFlags as normal but just append the command
in `preConfigure` directly, so we can preserve the space.
He prefers to contribute to his own nixpkgs fork triton.
Since he is still marked as maintainer in many packages
this leaves the wrong impression he still maintains those.
