Disable haskell-igraph, #5440
Disable haskell-igraph, #5440

simonmichael/stackage,massysett/stackage,mrkkrp/stackage,fpco/stackage,soenkehahn/stackage,Daniel-Diaz/stackage,jonschoning/stackage,iand675/stackage,michalkonecny/stackage,clinty/stackage