"There were multiple candidates for the Cabal entry" warnings when building happy #4076
Description
When building happy with stack (stack build, using this fork), stack issues these warnings:
Warning: There were multiple candidates for the Cabal entry " Parser
* C:\stack\src\Parser.ly
picking: C:\stack\src\Parser.hs
Warning: There were multiple candidates for the Cabal entry " AttrGrammarParser
* C:\stack\src\AttrGrammarParser.ly
picking: C:\stack\src\AttrGrammarParser.hs
[1 of 2] Compiling Main ( C:\sr\setup-exe-src\setup-Z6RU0evB.hs, C:\sr\setup-exe-src\setup-Z6RU0evB.o )
How can I fix them?