Do not set INCLUDE_INSTALL_DIR variable.

3 jobs for master in 2 minutes and 1 second (queued for 1 minute and 25 seconds)
Name Stage Failure
failed
suse_tumbleweed_qt62 Build
-- Configuring incomplete, errors occurred!
See also "/builds/system/kpmcore/_build/CMakeFiles/CMakeOutput.log".
## Failed to configure the project
Uploading artifacts for failed job
Uploading artifacts...
WARNING: JUnitTestResults.xml: no matching files
ERROR: No files to upload
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1