diff -up Arduino-1.6.4/hardware/arduino/avr/platform.txt.old Arduino-1.6.4/hardware/arduino/avr/platform.txt
--- Arduino-1.6.4/hardware/arduino/avr/platform.txt.old	2015-12-24 18:23:29.710425814 -0800
+++ Arduino-1.6.4/hardware/arduino/avr/platform.txt	2015-12-24 18:24:46.126892443 -0800
@@ -18,7 +18,8 @@ compiler.warning_flags.more=-Wall
 compiler.warning_flags.all=-Wall -Wextra
 
 # Default "compiler.path" is correct, change only if you want to overidde the initial value
+runtime.tools.avr-gcc.path=/usr
 compiler.path={runtime.tools.avr-gcc.path}/bin/
 compiler.c.cmd=avr-gcc
 compiler.c.flags=-c -g -Os {compiler.warning_flags} -ffunction-sections -fdata-sections -MMD
 # -w flag added to avoid printing a wrong warning http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59396
@@ -82,9 +82,9 @@ recipe.size.regex.eeprom=^(?:\.eeprom)\s
 # AVR Uploader/Programmers tools
 # ------------------------------
 
-tools.avrdude.path={runtime.tools.avrdude.path}
-tools.avrdude.cmd.path={path}/bin/avrdude
-tools.avrdude.config.path={path}/etc/avrdude.conf
+tools.avrdude.path=/
+tools.avrdude.cmd.path={path}usr/bin/avrdude
+tools.avrdude.config.path={path}etc/avrdude/avrdude.conf
 
 tools.avrdude.upload.params.verbose=-v
 tools.avrdude.upload.params.quiet=-q -q