[Haskell-cafe] How to add constraint to .cabal?

Hi, Say I have a package that only appends --constraint="template-haskell==2.7.0.0" --constraint="warp-tls==1.2.1" could I install it. Now I want to release the package, then how could I have these constraint into the .cabal so the user would not get troubled? -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com.