# How to reference a .fx via ebuild-build?
**URL:** https://talk.remobjects.com/t/how-to-reference-a-fx-via-ebuild-build/15586
**Category:** Elements
**Tags:** commandline
**Created:** [February 21, 2018, 7:51pm UTC](https://talk.remobjects.com/t/how-to-reference-a-fx-via-ebuild-build/15586 "2018-02-21T19:51:22Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@shpend\_hoti](https://talk.remobjects.com/u/shpend_hoti)
#### Post date: [February 21, 2018, 7:51pm UTC](https://talk.remobjects.com/t/how-to-reference-a-fx-via-ebuild-build/15586/1 "2018-02-21T19:51:23Z")
Hello 🙂
I have successfully created a 70KB malloc.h (just for testing HI) and I want to learn how to use your ebuild-tool, which is very nicely for cmd usage as I found, but I run into an error, when I want to try my “c\_rtl.fx” which is in the same solder as the project.elements, the error is: " Unknown namespace “c\_rtl” in uses list [C:\Users\Phoenix\Desktop\TEST\test\Program.pas (3)]"
Could you show me, how to add a reference to the .fx when build via ebuild?
The best regards
Shpend
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### Author:  [@mh](https://talk.remobjects.com/u/mh)
#### Post date: [February 21, 2018, 7:52pm UTC](https://talk.remobjects.com/t/how-to-reference-a-fx-via-ebuild-build/15586/2 "2018-02-21T19:52:56Z")
Just as you would reference anything else, add a Reference to it to your project…
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### Author:  [@shpend\_hoti](https://talk.remobjects.com/u/shpend_hoti)
#### Post date: [February 21, 2018, 7:55pm UTC](https://talk.remobjects.com/t/how-to-reference-a-fx-via-ebuild-build/15586/3 "2018-02-21T19:55:02Z")
thx for the fast response, but I want to add it via the command-line! 😉
I search something like: `ebuild project.elements --build --debug --reference c_rtl.fx`
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### Author:  [@mh](https://talk.remobjects.com/u/mh)
#### Post date: [February 21, 2018, 7:57pm UTC](https://talk.remobjects.com/t/how-to-reference-a-fx-via-ebuild-build/15586/4 "2018-02-21T19:57:30Z")
No, thats not now EBuild works. Add it as reference to your project.
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### Author:  [@shpend\_hoti](https://talk.remobjects.com/u/shpend_hoti)
#### Post date: [February 21, 2018, 7:58pm UTC](https://talk.remobjects.com/t/how-to-reference-a-fx-via-ebuild-build/15586/5 "2018-02-21T19:58:30Z")
Hmm, ok, thx for the response!