Configuration completed successfully. You may want to examine the make include file (Make.Linux_HAMMER64SSE3_4) for accuracy before starting the install with the command: make install arch=Linux_HAMMER64SSE3_4 rm -f ./xconfig sed: -e expression #3, char 42: unknown option to `s' !!! ERROR: sci-libs/blas-atlas-3.7.11-r1 failed. Call stack: ebuild.sh, line 1632: Called dyn_compile ebuild.sh, line 983: Called qa_call 'src_compile' ebuild.sh, line 44: Called src_compile blas-atlas-3.7.11-r1.ebuild, line 120: Called reconfigure blas-atlas-3.7.11-r1.ebuild, line 107: Called die Reproducible: Always Steps to Reproduce: emerge blas-atlas This seems to be a strangely recurring problem on different architectures, including x86. I have 3.7.11 installed on AMD64 at the moment, so it worked at some point in the past, attempting to recompile it fails. Problem occurs even when using "interactive=1" to compile it.