Disable stack2nix due to build failure (#4665)
Disable stack2nix due to build failure (#4665)

jonschoning/stackage,wereHamster/stackage,mrkkrp/stackage,iand675/stackage,fimad/stackage,fpco/stackage,spencerjanssen/stackage,michalkonecny/stackage,athanclark/stackage,Daniel-Diaz/stackage,massysett/stackage,simonmichael/stackage,clinty/stackage,stackbuilders/stackage,soenkehahn/stackage,asr/stackage