【发布时间】：2020-07-06 18:27:51
【问题描述】：
要使用Json，我想安装Aeson包。
在package.yaml 文件中，我将- aeson 添加到dependencies: 部分，我得到了一大堆错误，我无法在网上找到像：“但是这个GHC 引导包已被修剪”。
我试图理解错误，但我不理解其中任何一个。例如第一个：如果我做stack ls dependencies 我得到text 1.2.4.0，它符合匹配项，那为什么它不起作用？
有没有办法让 Stack 为我安装东西，而不必编辑 yaml 文件然后遇到问题？ （stack install 好像什么都没做）
完整的错误：
PS D:\Documents\Programming\Unity\Poging8_(catan)\HaskellServer> stack build
Error: While constructing the build plan, the following exceptions were encountered:
In the dependencies for aeson-1.4.7.1:
text must match >=1.2.3.0 && <1.3, but this GHC boot package has been pruned (issue #4510); you need to add the
package explicitly to extra-deps (latest matching version is 1.2.4.0)
needed due to HaskellCatanServer-0.1.0.0 -> aeson-1.4.7.1
In the dependencies for attoparsec-0.13.2.4:
text must match >=1.1.1.3, but this GHC boot package has been pruned (issue #4510); you need to add the package
explicitly to extra-deps (latest matching version is 1.2.4.0)
needed due to HaskellCatanServer-0.1.0.0 -> attoparsec-0.13.2.4
In the dependencies for ghc-boot-th-8.6.5:
base-4.13.0.0 from stack configuration does not match >=4.7 && <4.13 (latest matching version is 4.12.0.0)
needed due to HaskellCatanServer-0.1.0.0 -> ghc-boot-th-8.6.5
In the dependencies for hashable-1.3.0.0:
text must match >=0.12 && <1.3, but this GHC boot package has been pruned (issue #4510); you need to add the package
explicitly to extra-deps (latest matching version is 1.2.4.0)
needed due to HaskellCatanServer-0.1.0.0 -> hashable-1.3.0.0
In the dependencies for scientific-0.3.6.2:
text must match >=0.8, but this GHC boot package has been pruned (issue #4510); you need to add the package
explicitly to extra-deps (latest matching version is 1.2.4.0)
needed due to HaskellCatanServer-0.1.0.0 -> scientific-0.3.6.2
In the dependencies for template-haskell-2.14.0.0:
base-4.13.0.0 from stack configuration does not match >=4.9 && <4.13 (latest matching version is 4.12.0.0)
needed due to HaskellCatanServer-0.1.0.0 -> template-haskell-2.14.0.0
In the dependencies for time-1.8.0.4:
base-4.13.0.0 from stack configuration does not match >=4.7 && <4.13 (latest matching version is 4.12.0.0)
needed due to HaskellCatanServer-0.1.0.0 -> time-1.8.0.4
In the dependencies for uuid-types-1.0.3:
text must match >=1 && <1.3, but this GHC boot package has been pruned (issue #4510); you need to add the package
explicitly to extra-deps (latest matching version is 1.2.4.0)
needed due to HaskellCatanServer-0.1.0.0 -> uuid-types-1.0.3
Some different approaches to resolving this:
* Build requires unattainable version of base. Since base is a part of GHC, you most likely need to use a different
GHC version with the matching base.
Plan construction failed.
附加信息：
在package.yaml我有依赖：
- base >= 4.7 && < 5
- network
- bytestring
- aeson
我没有手动编辑 stack.yaml，我有解析器 lts-16.3 和额外的deps：
- ghc-8.6.5@sha256:3591225289bdf8cf8f62b10f2aebc9ea3e25a15294545a5312a419e0317784f9,13976
- ghc-boot-8.6.5@sha256:8b608d2f36aad99a37a7d1b70319d43195128de6485b15fa7d4638b2942ce2a2,1772
- ghc-boot-th-8.6.5@sha256:c120f0d15944e770e2b698f5139f0003a86f9e25e5d1a7c6631e442129232748,1075
- ghci-8.6.5@sha256:886e52e6ab43b0de39fd5d92d8d1a5d7fac04c0f145c62b39baae04476208bd9,2126
- template-haskell-2.14.0.0@sha256:e3747ae9e2aeec160196706dd470b5fc4175678ec4136bcec9124534f67d83bc,1724
- time-1.8.0.4@sha256:3f6eddf238b828eb4f82683acce1c3afe64784f0d20114239b738c123316c85c,5494
stack ls dependencies
Win32 2.6.1.0
aeson 1.4.7.1
array 0.5.4.0
attoparsec 0.13.2.4
base 4.13.0.0
base-compat 0.11.1
base-compat-batteries 0.11.1
base-orphans 0.8.2
binary 0.8.7.0
bytestring 0.10.10.0
containers 0.6.2.1
deepseq 1.4.4.0
dlist 0.8.0.8
filepath 1.4.2.1
ghc-boot-th 8.6.5
ghc-prim 0.5.3
hashable 1.3.0.0
integer-gmp 1.0.2.0
integer-logarithms 1.0.3
network 3.1.1.1
pretty 1.1.3.6
primitive 0.7.0.1
random 1.1
rts 1.0
scientific 0.3.6.2
tagged 0.8.6
template-haskell 2.14.0.0
text 1.2.4.0
th-abstraction 0.3.2.0
time 1.8.0.4
time-compat 1.9.3
transformers 0.5.6.2
unordered-containers 0.2.10.0
uuid-types 1.0.3
vector 0.12.1.2
【问题讨论】：
-
尝试删除所有这些额外的依赖。
-
@arrowd 这很简单。如果您知道为什么这会有所帮助，也许您可以写一个答案？现在看起来很神奇，因为我一开始并没有编辑那个文件。
-
这正是我不能写答案的原因。一般来说，
stack.yaml是非常小的文件，所以我也不知道所有这些约束来自哪里。根据经验，尽量让所有多余的东西远离stack.yaml。
标签： haskell dependency-management haskell-stack