# Cmake Error on Ubuntu
**URL:** https://community.easyrpg.org/t/cmake-error-on-ubuntu/1279
**Category:** Editor
**Created:** [June 27, 2023, 10:10am UTC](https://community.easyrpg.org/t/cmake-error-on-ubuntu/1279 "2023-06-27T10:10:22Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Melonpan37](https://community.easyrpg.org/u/Melonpan37)
#### Post date: [June 27, 2023, 10:10am UTC](https://community.easyrpg.org/t/cmake-error-on-ubuntu/1279/1 "2023-06-27T10:10:22Z")
Hello everyone!
I’ve been following this project for a while now. I like the idea of an open source alternative to rm2k and rm2k3 editors, and the player is awesome of course. So i thought I could take a look at the code for the editor, and maybe contribute if possible (I’m an almost-graduated CS student, so I know c/c++). The problem is that I can’t get cmake to work for the editor.
I successfully managed to compile and execute the player, but that’s not the case with the editor.
I’m running Ubuntu 20.04, and I should have all the needed dependencies, but when I try to use `cmake .` to create the makefile from bash I get this error :
```auto
CMake Error at CMakeLists.txt:337 (add_executable):
Target "EasyRPG_Editor" links to target "EXPAT::EXPAT" but the target was
not found. Perhaps a find_package() call is missing for an IMPORTED
target, or an ALIAS target is missing?
```
I’ve tried to fix this on my own, but I’m not very familiar with cmake.
Can someone help me?
---
### Author:  [@carstene1ns](https://community.easyrpg.org/u/carstene1ns)
#### Post date: [July 1, 2023, 10:08pm UTC](https://community.easyrpg.org/t/cmake-error-on-ubuntu/1279/2 "2023-07-01T22:08:11Z")
Are you building internal liblcf?
You need to install `libexpat1-dev`, however, if Player builds fine, this should not be an issue.