Two issues: Please replace the BuildRequires: glibc-headers with BuildRequires: gcc. The new Fedora packaging guidelines require you define all the things you need in the buildroot to build [1]. Given that this is a C library it should BuildRequires: gcc, and that is sufficient to bring in all of the required core C libraries and headers to compile C code. The reason I'm asking is because glibc-headers may or may not be removed in the future and it isn't sufficient to guarantee the package builds. [1] https://fedoraproject.org/wiki/Packaging:Guidelines#BuildRequires_2 *and* The devel package should not Requires on glibc-headers. The development libraries and headers will be used by developers via BuildRequires, but along with BuildRequires: gcc or BuildRequires: gcc-gfortran or BuildRequires: gcc-c++ to be able to compile their code. The compiler will ensure the standard libraries and headers are installed to make sure the library headers are complete e.g. that #include <stdio.h> works. There is no need to Require: glibc-headers. The reason I'm asking for the removal of glibc-headers is that the package may or may not go away in the future depending on sub-package restructuring, and it is not needed.