相依性（英语：Dependency hell），是指在操作系统中由于软件之间的依赖性不能被满足而引发的问题。

一个软件包依赖于其它必要的软件包（且版本要符合要求），使得软件包系统形成了复杂的依赖关系网络，并可能引发一系列问题。一些软件包可能因为依赖性无法满足，需要安装大量软件包；另一方面，一个软件包的卸载可能引发数量众多的软件包无法工作。

目前，GNU/Linux通过高级软件包管理机制，一定程度上解决了相依性地狱问题。较著名的有Debian阵营的APT和Redhat阵营的Yum。

Dependency hell is a colloquial term for the frustration of some software users who have installed software packages which have dependencies on specific versions of other software packages.

The dependency issue arises around shared packages or libraries on which several other packages have dependencies but where they depend on different and incompatible versions of the shared packages. If the shared package or library can only be installed in a single version, the user may need to address the problem by obtaining newer or older versions of the dependent packages. This, in turn, may break other dependencies and push the problem to another set of packages.