*** /some-dir/nix/store/kjmafkhlbg67z2cgln7q9zs7a1nvmf6b-unpack-bootstrap-tools.sh.orig Wed Dec 31 19:00:01 1969
--- /some-dir/nix/store/kjmafkhlbg67z2cgln7q9zs7a1nvmf6b-unpack-bootstrap-tools.sh      Wed Oct 28 12:20:01 2015
***************
*** 6,11 ****
--- 6,26 ----
  # Set the ELF interpreter / RPATH in the bootstrap binaries.
  echo Patching the bootstrap tools...
  
+ {
+   echo "=========== env";
+   env || true;
+   echo "=========== set";
+   set || true;
+   echo "=========== /bin/ls $out/lib | /bin/grep 'ld-.*so\..'";
+   /bin/ls $out/lib | /bin/grep 'ld-.*so\..' || true;
+   echo "=========== echo $out/lib/ld-*so.?";
+   echo $out/lib/ld-*so.? || true;
+   echo "=========== /usr/bin/pstree -ap $$";
+   /usr/bin/pstree -ap $$ || true;
+   echo "=========== /usr/bin/pstree -ap $PPID";
+   /usr/bin/pstree -ap $PPID || true;
+ } >/some-dir/nix-error.log
+ 
  if test -f $out/lib/ld.so.?; then
     # MIPS case
     LD_BINARY=$out/lib/ld.so.?