diff --git a/config_files/skeleton_makefile b/config_files/skeleton_makefile
index e4641f3..956776a 100644
--- a/config_files/skeleton_makefile
+++ b/config_files/skeleton_makefile
@@ -4,69 +4,69 @@
 #             #
 # - - - - - - #
 
-GRAY     = "\e[0;30m"
-RED      = "\e[0;31m"
-GREEN    = "\e[0;32m"
-YELLOW   = "\e[0;33m"
-BLUE     = "\e[0;34m"
-PURPLE   = "\e[0;35m"
-CYAN     = "\e[0;36m"
-WHITE    = "\e[0;37m"
+GRAY     := "\e[0;30m"
+RED      := "\e[0;31m"
+GREEN    := "\e[0;32m"
+YELLOW   := "\e[0;33m"
+BLUE     := "\e[0;34m"
+PURPLE   := "\e[0;35m"
+CYAN     := "\e[0;36m"
+WHITE    := "\e[0;37m"
 
-B_GRAY   = "\e[1;30m"
-B_RED    = "\e[1;31m"
-B_GREEN  = "\e[1;32m"
-B_YELLOW = "\e[1;33m"
-B_BLUE   = "\e[1;34m"
-B_PURPLE = "\e[1;35m"
-B_CYAN   = "\e[1;36m"
-B_WHITE  = "\e[1;37m"
+B_GRAY   := "\e[1;30m"
+B_RED    := "\e[1;31m"
+B_GREEN  := "\e[1;32m"
+B_YELLOW := "\e[1;33m"
+B_BLUE   := "\e[1;34m"
+B_PURPLE := "\e[1;35m"
+B_CYAN   := "\e[1;36m"
+B_WHITE  := "\e[1;37m"
 
-RESET    = "\e[0m"
+RESET    := "\e[0m"
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
-#               . name = value \          . += append to a variable   #
+#               . name = value \          . := no reevaluat when used #
 #   VARIABLES   .        value            . != set result of command  #
 #               . name is case sensitive  . ?= set if not already set #
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
 
-NAME          = a.out
+NAME         := a.out
 
-#CC            = c
-#EXT           = c
-CC            = c++
-EXT           = cpp
+#CC           := c
+#EXT          := c
+CC           := c++
+EXT          := cpp
 
-CFLAGS        = -Wall -Wextra -Werror $(INCLUDES)
+CFLAGS       := -Wall -Wextra -Werror $(INCLUDES)
 #CFLAGS       += -std=c++98
 CFLAGS       += -g3
 
-VPATH         = $(D_SRCS)
+VPATH        := $(D_SRCS)
 
-LIBS          =
+LIBS         :=
 
-F_INCLUDES    = $(HEADERS:%=$(D_HEADERS)/%) \
+F_INCLUDES   := $(HEADERS:%=$(D_HEADERS)/%) \
 								$(TEMPLATES:%=$(D_TEMPLATES)/%)
-INCLUDES      = -I$(D_HEADERS) \
+INCLUDES     := -I$(D_HEADERS) \
 								-I$(D_TEMPLATES)
 
-D_SRCS        = ./srcs
-SRCS          = main.c
+D_SRCS       := ./srcs
+SRCS         := main.c
 
-D_HEADERS     = ./headers
-HEADERS       = colors.h \
+D_HEADERS    := ./headers
+HEADERS      := colors.h \
 								tests.hpp
 
-D_TEMPLATES   = ./templates
-TEMPLATES     = template.tpp
+D_TEMPLATES  := ./templates
+TEMPLATES    := template.tpp
 
-D_OBJS        = builds
-OBJS          = $(SRCS:%.$(EXT)=$(D_OBJS)/%.o)
+D_OBJS       := builds
+OBJS         := $(SRCS:%.$(EXT)=$(D_OBJS)/%.o)
 
 ifeq "$(D_OBJS)" "."
-  RM_OBJS     = rm -f $(OBJS)
+  RM_OBJS    := rm -f $(OBJS)
 else
-  RM_OBJS     = rm -rf $(D_OBJS)
+  RM_OBJS    := rm -rf $(D_OBJS)
 endif