* Include some missing headers.

src/libstore/normalise.cc

@@ -7,6 +7,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <errno.h>
 
 #include "normalise.hh"
 #include "references.hh"

src/nix-env/profiles.cc

@@ -3,6 +3,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <errno.h>
 
 
 static bool cmpGensByNumber(const Generation & a, const Generation & b)