Haskell Yesod问题

Question

有人可以帮我吗？！ 我在Haskell Yesod网站上工作，在C9工作区上大学，我已经通过命令Yesod安装并更新了cabal，但是当我尝试“stack build”命令时，会出现这个可怜的错误消息：

 $ stack build

aulahaskell-0.0.0: build (lib + exe)
Preprocessing library aulahaskell-0.0.0...
[ 7 of 13] Compiling Handler.Cliente  ( src/Handler/Cliente.hs, .stack-work/dist/x86_64-linux/Cabal-1.24.2.0/build/Handler/Cliente.o )

/home/ubuntu/workspace/web2017/src/Handler/Cliente.hs:10:1: error:
    Failed to load interface for ‘Network.HTTP.Types.Status’
    It is a member of the hidden package ‘http-types-0.9.1’.
    Perhaps you need to add ‘http-types’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

--  While building package aulahaskell-0.0.0 using:
      /home/ubuntu/.stack/setup-exe-cache/x86_64-linux/Cabal-simple_mPHDZzAJ_1.24.2.0_ghc-8.0.2 --builddir=.stack-work/dist/x86_64-linux/Cabal-1.24.2.0 build lib:aulahaskell exe:aulahaskell --ghc-options " -ddump-hi -ddump-to-file"
    Process exited with code: ExitFailure 1

说真的，我尝试了很多东西来解决它，但没有任何工作= S.

Answer 1

只需仔细阅读错误消息：

Failed to load interface for ‘Network.HTTP.Types.Status’
It is a member of the hidden package ‘http-types-0.9.1’.
Perhaps you need to add ‘http-types’ to the build-depends in your .cabal file.
Use -v to see a list of the files searched for.

该行或许您需要在构建中添加“http-types” - 依赖于.cabal文件，告诉您该怎么做：您必须将http-types添加到cabal文件库aulahaskell的build-depends：部分。

如果这没有帮助，请发布您的cabal文件。

Answer 2

你是如何开始yesod项目的？ 建议这样做：

stack new my-yesod-project yesod-(your database here)
cd my-yesod-project
stack build

Answer 3

感谢你们！ 这是我启动项目的一个问题，我的工作区没有安装一些文件，所以我删除文件，重新安装Yesod和cabal，按照以下步骤创建另一个新版本： https：//www.yesodweb。 COM /页/快速入门