[英]cabal dependencies are missing in Yesod and stack
Hi i try to create a new proyect for yesod using stack, follow the quickstart tutorial; 您好我尝试使用堆栈为yesod创建一个新的proyect,按照快速入门教程; to create the scaffolding I use the command:
创建脚手架我使用命令:
stack new my-project yesod-postgres && cd my-project
But when run stack exec -- yesod devel
get: 但是当运行
stack exec -- yesod devel
得到:
cabal: At least the following dependencies are missing:
classy-prelude >=0.10.2,
classy-prelude-conduit >=0.10.2,
classy-prelude-yesod >=0.10.2,
data-default -any,
hjsmin >=0.1 && <0.3,
monad-logger ==0.3.*,
persistent >=2.0 && <2.6,
persistent-postgresql >=2.1.1 && <2.6,
persistent-template >=2.0 && <2.6,
safe -any,
yesod >=1.4.3 && <1.5,
yesod-auth >=1.4.0 && <1.5,
yesod-core >=1.4.17 && <1.5,
yesod-form >=1.4.0 && <1.5,
yesod-static >=1.4.0.3 && <1.6
I try with the command stack exec -- cabal install
but get: 我尝试使用命令
stack exec -- cabal install
但得到:
cabal: Use of GHC's environment variable GHC_PACKAGE_PATH is incompatible with
Cabal. Use the flag --package-db to specify a package database (it can be used multiple times).
Thanks for the help 谢谢您的帮助
EDIT 编辑
The command to install the postgres library in ubuntu: 在ubuntu中安装postgres库的命令:
sudo apt-get install -y libpq-dev
As described in the Yesod quick start page , you have to do this inside the project: 如Yesod快速入门页面所述 ,您必须在项目中执行此操作:
stack build yesod-bin cabal-install --install-ghc
stack build
And then, 接着,
stack exec -- yesod devel
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