--- deco-git-180320.old/config.mk
+++ deco-git-180320/config.mk
@@ -1,9 +1,9 @@
-CC       = c99
+CC       = gcc
 CPPFLAGS = -D_XOPEN_SOURCE=600 -D_FILE_OFFSET_BITS=64
 CFLAGS   = -O2
 LDFLAGS  = -s
 
 DESTDIR =
-PREFIX  = /usr/local
+PREFIX  = __META_PREFIX__
 BIN     = $(PREFIX)/bin
 SHARE   = $(PREFIX)/share/deco
--- deco-git-180320.old/deco-archive/config.mk
+++ deco-git-180320/deco-archive/config.mk
@@ -1,5 +1,5 @@
 DESTDIR  =
-PREFIX   = /usr/local
+PREFIX   = __META_PREFIX__
 SHARE    = $(PREFIX)/share/deco
 USER     = "$$HOME"/.deco
 LOCATION = $(DESTDIR)$(SHARE)