Hi @Faxe,
sonarcloud-scan pipe runs in a docker container, ie see https://bitbucket.org/sonarsource/sample-nodejs-project/addon/pipelines/home#!/results/152, you can see it in the logs of pipe: sonarsource/sonarcloud-scan:0.1.5. For C/C++ analysis the sonar-scanner should be ran at the same OS/container layer of the build, you should set it up manually without the use of pipe: sonarsource/sonarcloud-scan.