Failed in make build: hGetContents error for languages.csv

[saludes]

On the make step using ghc version 8.6.5 it gives me:

Building [Prelude]
Setup.hs: languages.csv: hGetContents: invalid argument (invalid byte sequence)

I fixed it by changing the non-ascii character in:

gf-rgl/languages.csv

Line 34 in a3701d1

Nor,Norwegian (bokmål),norwegian,Scand,,y,,,,,y

That could be relevant to the issue.