Haskell 将构建工具（Alex）与堆栈和GHCJ一起使用

我依赖于一个需要alex构建的包，我也需要ghcjs

当我尝试运行

堆栈ghci

时：

language-java-0.2.8: configure (lib)

Error:
--  While building package language-java-0.2.8 using:
      <long command>
    Process exited with code: ExitFailure 1
    Logs have been written to: /Users/LeanderK/Documents/Haskell/exemplator-java_parser/.stack-work/logs/language-java-0.2.8.log

Configuring language-java-0.2.8...
Cabal-simple_mPHDZzAJ_1.24.2.0_ghcjs-0.2.1.9007019_ghc-8.0.1: The program
'alex' version >=3.1.3 is required but it could not be found.

Warning: Build failed, but optimistically launching GHCi anyway
The following GHC options are incompatible with GHCi and have not been passed to it: -threaded
Configuring GHCi with the following packages: exemplator-client
Using main module: 1. Package `exemplator-client' component exe:exemplator-client-exe with main-is file:         ..../app/Main.hs
Progress: 1/2<command line>: cannot satisfy -package language-java-0.2.8
(use -v for more information)

---

仅供参考：是依赖项的cabal文件，不幸的是仅在github上找到。是我的堆栈和文件。还有一个讨论没有进行到任何地方。

阴谋集团是否在

~

中安装alex有效？阴谋集团是否自动安装到

~/.cabal/bin

cabal安装alex

确实有效，但不会改变stack的情况。有没有办法让stack知道alex安装了cabal？如果存在，cabal默认会安装到沙箱中，这就是我添加该选项的原因。不过，我不知道堆栈，抱歉。好的，我通过cabal在没有任何沙箱的情况下全局安装了alex，不幸的是它无法工作。我认为您需要将

构建工具：alex

添加到cabal文件中的库中。

Couldn't find executable alex in directory .../.stack/snapshots/x86_64-osx/lts-7.19/ghcjs-0.2.1.9007019_ghc-8.0.1/bin/