* A GC setting `gc-keep-outputs' to specify whether output paths of

derivations should be kept.

src/libmain/Makefile.am

@@ -7,5 +7,6 @@ AM_CXXFLAGS = \
  -DNIX_DATA_DIR=\"$(datadir)\" \
  -DNIX_STATE_DIR=\"$(localstatedir)/nix\" \
  -DNIX_LOG_DIR=\"$(localstatedir)/log/nix\" \
+ -DNIX_CONF_DIR=\"$(sysconfdir)/nix\" \
  -DNIX_VERSION=\"$(VERSION)\" \
  -I.. ${aterm_include} -I../libutil -I../libstore