yesod - 需要有关如何进行 Yesod 安装的建议

Question

我将以下错误解释为 Yesod 依赖项 authenticate-0.10.2.2 需要 attoparsec ==0.9.*，但 Yesod 本身需要 attoparsec >=0.10。我能做些什么来解决这个问题？>

Resolving dependencies...
cabal: cannot configure authenticate-0.10.2.2. It requires attoparsec ==0.9.*
For the dependency on attoparsec ==0.9.* there are these packages:
attoparsec-0.9.0.0, attoparsec-0.9.1.1 and attoparsec-0.9.1.2. However none of
them are available.
attoparsec-0.9.0.0 was excluded because attoparsec-enumerator-0.3 requires
attoparsec ==0.10.*
attoparsec-0.9.0.0 was excluded because yesod-0.9.4.1 requires attoparsec >=0.10

attoparsec-0.9.1.1 was excluded because attoparsec-enumerator-0.3 requires 
attoparsec ==0.10.*
attoparsec-0.9.1.1 was excluded because yesod-0.9.4.1 requires attoparsec

 >=0.10
  attoparsec-0.9.1.2 was excluded because attoparsec-enumerator-0.3 requires
  attoparsec ==0.10.*
  attoparsec-0.9.1.2 was excluded because yesod-0.9.4.1 requires attoparsec
 >=0.10

Answer 1

我不知道为什么 cabal 试图安装旧版本的身份验证。尝试对其设置下限，即authenticate >= 0.10.4，应该可以。