I've tried this out with 5.4-rc1, rc7 and rc8 from the same PPA on focal and it works for me. Perhaps you are using a version of GCC on an older release that won't build against those kernel headers. cking@focal-amd64-efi:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Focal Fossa (development branch) Release: 20.04 Codename: focal cking@focal-amd64-efi:~$ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none:hsa OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.2.1-19ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 9.2.1 20191109 (Ubuntu 9.2.1-19ubuntu1) cking@focal-amd64-efi:~$ sudo apt-get install fwts-efi-runtime-dkms Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: libfdt1 libfwts1 libfwtsacpica1 libfwtsiasl1 Use 'sudo apt autoremove' to remove them. The following NEW packages will be installed fwts-efi-runtime-dkms 0 to upgrade, 1 to newly install, 0 to remove and 0 not to upgrade. Need to get 0 B/13.4 kB of archives. After this operation, 103 kB of additional disk space will be used. Selecting previously unselected package fwts-efi-runtime-dkms. (Reading database ... 258496 files and directories currently installed.) Preparing to unpack .../fwts-efi-runtime-dkms_19.11.00-0ubuntu1_amd64.deb ... Unpacking fwts-efi-runtime-dkms (19.11.00-0ubuntu1) ... Setting up fwts-efi-runtime-dkms (19.11.00-0ubuntu1) ... Loading new fwts-efi-runtime-dkms-19.11.00 DKMS files... Building for 5.4.0-5-generic 5.4.0-050400rc8-generic Building initial module for 5.4.0-5-generic Secure Boot not enabled on this system. Done. efi_runtime.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.4.0-5-generic/updates/dkms/ depmod... DKMS: install completed. Building initial module for 5.4.0-050400rc8-generic Secure Boot not enabled on this system. Done. efi_runtime.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.4.0-050400rc8-generic/updates/dkms/ depmod... DKMS: install completed. cking@focal-amd64-efi:~$ ls /var/lib/initramfs-tools | sudo xargs -n1 /usr/lib/dkms/dkms_autoinstaller start * dkms: running auto installation service for kernel 5.2.0-8-generic Kernel preparation unnecessary for this kernel. Skipping... Building module: cleaning build area... KVER=5.2.0-8-generic make.... Signing module: - /var/lib/dkms/fwts-efi-runtime-dkms/19.11.00/5.2.0-8-generic/x86_64/module/efi_runtime.ko Secure Boot not enabled on this system. cleaning build area... DKMS: build completed. efi_runtime.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.2.0-8-generic/updates/dkms/ depmod..... DKMS: install completed. [ OK ] * dkms: running auto installation service for kernel 5.3.0-18-generic Kernel preparation unnecessary for this kernel. Skipping... Building module: cleaning build area... KVER=5.3.0-18-generic make.... Signing module: - /var/lib/dkms/fwts-efi-runtime-dkms/19.11.00/5.3.0-18-generic/x86_64/module/efi_runtime.ko Secure Boot not enabled on this system. cleaning build area... DKMS: build completed. efi_runtime.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.3.0-18-generic/updates/dkms/ depmod..... DKMS: install completed. [ OK ] * dkms: running auto installation service for kernel 5.4.0-050400rc1-generic Kernel preparation unnecessary for this kernel. Skipping... Building module: cleaning build area... KVER=5.4.0-050400rc1-generic make.... Signing module: - /var/lib/dkms/fwts-efi-runtime-dkms/19.11.00/5.4.0-050400rc1-generic/x86_64/module/efi_runtime.ko Secure Boot not enabled on this system. cleaning build area... DKMS: build completed. efi_runtime.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.4.0-050400rc1-generic/updates/dkms/ depmod... DKMS: install completed. [ OK ] * dkms: running auto installation service for kernel 5.4.0-050400rc7-generic Kernel preparation unnecessary for this kernel. Skipping... Building module: cleaning build area... KVER=5.4.0-050400rc7-generic make.... Signing module: - /var/lib/dkms/fwts-efi-runtime-dkms/19.11.00/5.4.0-050400rc7-generic/x86_64/module/efi_runtime.ko Secure Boot not enabled on this system. cleaning build area... DKMS: build completed. efi_runtime.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.4.0-050400rc7-generic/updates/dkms/ depmod.... DKMS: install completed. [ OK ] * dkms: running auto installation service for kernel 5.4.0-050400rc8-generic [ OK ] * dkms: running auto installation service for kernel 5.4.0-5-generic [ OK ]