Hi, I have the following problem with the new GCC 4.3 package from Nixpkgs: $ cat ,,t.c #include <complex.h> int foo () { return 0; } $ gcc -c ,,t.c In file included from ,,t.c:1: /nix/store/aqy5z30mbgq2c65y2m3x3flbzw5bhvsj-gcc-4.3.1/include/c++/4.3.1/complex.h:34:28: error: bits/c++config.h: No such file or directory Any idea? Thanks, Ludovic.