diff -uNr crunch-3.6/Makefile crunch-3.6.mod/Makefile
--- crunch-3.6/Makefile	2014-05-03 20:04:11.000000000 +0300
+++ crunch-3.6.mod/Makefile	2019-01-31 00:31:33.642061600 +0200
@@ -28,7 +28,7 @@
 # General variables
 PACKAGE	    = crunch
 VERSION	    = 3.6
-PREFIX	    = /usr
+PREFIX	    ?= /usr
 DISTDIR	    = $(PACKAGE)-$(VERSION)
 DISTFILES   = crunch.c crunch.1 charset.lst
 BINDIR	    = $(PREFIX)/bin
@@ -37,8 +37,8 @@
 DOCDIR	    = $(PREFIX)/share/doc/$(PACKAGE)
 MANDIR	    = $(PREFIX)/share/man/man1
 
-INSTALL	    = sudo $(shell which install)
-CC	    = $(shell which gcc)
+INSTALL	    = $(shell which install)
+CC	    ?= $(shell which gcc)
 LIBFLAGS    = -lm
 THREADFLAGS = -pthread
 OPTFLAGS    = -g -o0
@@ -56,7 +56,7 @@
  LFS=""  
 else
 #non-mac as you were 
-  INSTALL_OPTIONS = -g root -o root
+  INSTALL_OPTIONS =
 endif
 
 # Default target