Closely related to the session module is the package management functionality (which is derived from scripths). Since we are using the system GHCi process we can control what packages are visible to it by giving it custom package environments. When a package is installed we run cabal install --lib –package-env= then restart the GHCi session. This is the recommended way (at time of writing) of making GHCi play well with packages.
在1979年那场颠覆巴列维王朝、建立伊朗伊斯兰共和国的革命中，主力并非来自单一阶级，而是一个由传统精英、现代知识分子、底层民众和左翼力量组成的“反巴列维联盟”。
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