commit e4de91ecf27351ab85b49f71520ed95f3f188f5c
Author: Roger Pueyo Centelles <roger.pueyo@guifi.net>
Date:   Fri Jul 10 19:57:54 2015 +0200

    Fix #373. Use a hyphen instead of an underscore in the timestamp between date and time

diff --git a/Makefile b/Makefile
index 8fdc0b3..bcd90e2 100644
--- a/Makefile
+++ b/Makefile
@@ -57,7 +57,7 @@ EXTRA_PACKS =
 include targets.mk
 
 PROFILE ?= ath-qmp-tiny-node
-TIMESTAMP = $(shell date +%Y%m%d_%H%M)
+TIMESTAMP = $(shell date +%Y%m%d-%H%M)
 
 #Checking if developer mode is enabled and if target is defined before
 $(eval $(if $(DEV),QMP_GIT=$(QMP_GIT_RW),QMP_GIT=$(QMP_GIT_RO)))