# Troubleshooting: Mixing up dependencies from system and Spack
**URL:** https://precice.discourse.group/t/troubleshooting-mixing-up-dependencies-from-system-and-spack/411
**Category:** Installing preCICE
**Tags:** spack
**Created:** [January 6, 2021, 2:29pm UTC](https://precice.discourse.group/t/troubleshooting-mixing-up-dependencies-from-system-and-spack/411 "2021-01-06T14:29:14Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Makis](https://precice.discourse.group/u/Makis)
#### Post date: [January 6, 2021, 2:29pm UTC](https://precice.discourse.group/t/troubleshooting-mixing-up-dependencies-from-system-and-spack/411/1 "2021-01-06T14:29:14Z")
In case you see that Spack reports an error in which points to a non-spack directory, maybe you are forcing your compiler to look at places it shouldn’t. Please avoid setting environment variables such as `CPLUS_INCLUDE_PATH`, `LD_LIBRARY_PATH`, or `LIBRARY_PATH` when using Spack. This can particularly lead to problems if you have a (broken) installation of a requested dependency in that path.
Keep in mind that, by default, Spack will use the default compiler of your system.
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### Author:  [@Makis](https://precice.discourse.group/u/Makis)
#### Post date: [January 6, 2021, 2:30pm UTC](https://precice.discourse.group/t/troubleshooting-mixing-up-dependencies-from-system-and-spack/411/2 "2021-01-06T14:30:19Z")
(this topic was only meant to move information here from the old preCICE wiki)
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### Author:  [@Makis](https://precice.discourse.group/u/Makis)
#### Post date: [January 9, 2021, 2:30pm UTC](https://precice.discourse.group/t/troubleshooting-mixing-up-dependencies-from-system-and-spack/411/3 "2021-01-09T14:30:22Z")
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