Building of telegram-api in dependencies runs out of memory

[viviag]

$ stack --version
Version 1.6.1, Git revision f25811329bbc40b0c21053a8160c56f923e1201b (5435 commits) x86_64 hpack-0.20.0

I'm building package with telegram-api in dependencies. It runs out of memory and take a lot of time (such I've never seen it ended) while building telegram-api. Same thing with --fast.
stack build on standalone package works with memory consumption less than 1G.

With version 1.5.1 everything ends.

[mgsloan]

I ran it, and stack has typical memory usage. GHC uses a fair bit and takes a while to compile. I took a look at the package, and it has large datatypes and uses generic deriving.

This is not a stack bug. It would be great if GHC was faster for this, but that's a complex upstream issue.