--- Makefile.local.orig
+++ Makefile.local
@@ -58,6 +58,13 @@
 # CALC_SHAREDIR:= ${PREFIX}/share/calc
 # CALC_INCDIR:= ${PREFIX}/include/calc
 ####
+
+PREFIX=___PREFIX___
+CALC_INCDIR:= ${PREFIX}/include/calc
+USE_READLINE:= -DUSE_READLINE
+READLINE_LIB:= -L${PREFIX}/lib -lreadline
+READLINE_EXTRAS:= -lhistory -lncurses
+ARCH_CFLAGS:=