Eyecandy update for nix_integration.md
Eyecandy update for nix_integration.md

fixed a couple of outdated link anchors too
MichielDerhaeg/stack,AndreasPK/stack,martin-kolinek/stack,phadej/stack,phadej/stack,sjakobi/stack,narrative/stack,deech/stack,luigy/stack,rubik/stack,mrkkrp/stack,Blaisorblade/stack,harendra-kumar/stack,martin-kolinek/stack,anton-dessiatov/stack,rubik/stack,sjakobi/stack,anton-dessiatov/stack,luigy/stack,mrkkrp/stack,deech/stack,juhp/stack,Fuuzetsu/stack,MichielDerhaeg/stack,Heather/stack,AndrewRademacher/stack,achernyak/stack,keent/stack,keent/stack,AndrewRademacher/stack,AndreasPK/stack,harendra-kumar/stack,achernyak/stack,Blaisorblade/stack,juhp/stack,Fuuzetsu/stack,Heather/stack,narrative/stack