compilation: ls *c *h | entr make test
haskell: ls Vger.hs Gemini.hs | entr -s "ghc Vger.hs && printf 'gemini://perso.pw/../Vger.hs\r\n' | ./Vger"
haskell-unit: ls *hs | entr -s "ghc unit.hs && ./unit"