Okay, so what I achieved/understood so far is this: What Open Build Service does is extract my helloWorld-1.tar.gz After that we have a folder helloWorld-1 in our working directory. After which we change into that directory. Afterwards my build command "g++ -o helloWorldBin helloWorld.cpp" is executed, so I have a binary called "helloWorldBin" in my helloWorld-1 folder. As you said I now need to copy this binary into the" $RPM_BUILDROOT%{_bindir}" -Folder in the install section and add this file to the files section. Did I miss anything? If not, why can´t I just add the binary to the files Section? Because I just have one .cpp file and no make file I can´t execute any make commands like all of the examples I found., I tried to do the following: --- Name: helloWorld Version: 1 Release: 0 License: GPL-2.0+ Summary: helloWorld Url: http://www.qosmotec.com Group: Other Source: helloWorld-1.tar.gz BuildRequires: gcc-c++ cmake BuildRoot: %{_tmppath}/helloWorld %description %prep %setup -q %build g++ -o helloWorldBin helloWorld.cpp %install cp helloWorldBin $RPM_BUILDROOT%{_bindir}/hello_world_1 %post %postun %files %defattr(-,root,root) $RPM_BUILDROOT%{_bindir}/hello_world_1 ------ I get the following error: cp: cannot create regular file `/usr/bin/hello_world_1': Permission denied Somehow the spec guideline isn´t helping me much (https://en.opensuse.org/openSUSE:Specfile_guidelines) Excuse me for asking again and thank you very much for your help! Tobias N�����r��y隊Z)z{.���Wlz��qﮞ˛���m�)z{.��+�: �{Zr�az�'z��j)h���Ǜ�)]���Ǿ� ޮ�^�ˬz��