diff --git a/NOISE b/NOISE
index a4cf4cd5..2d5cd6cb 100644
--- a/NOISE
+++ b/NOISE
@@ -109,12 +109,12 @@ ABSTRACT
 
 /* vim: set ts=2 sw=2 tw=72 fo=watqc expandtab spell autoindent: */
 
-1.8 Nix compilation environment
+1.8 Make doesn't rebuild objects
 
   When using local repo as src code, (e.g. developer mode on) a make
   clean at the preBuild stage is required.
 
-  Nix sets the current date to the files copied from repos.
+  Nix sets the same modification date (one second after the Epoch (1970-01-01 at 00:00:01 in UTC timezone) to all the files in the nix store (also those copied from repos).
   Makefile checks the files modification date in order to call or not
   the compilation instructions.
   If any object/binary file exists out of Nix, at the time we build