diff --git a/makefile b/makefile
index 4973273..10cc672 100644
--- a/makefile
+++ b/makefile
@@ -10,19 +10,15 @@ OS_CCDEFS = -lsocket -lnsl -lpthread -D_GNU_SOURCE
 else
 OS_CCDEFS = -D_GNU_SOURCE
 endif
-ifeq ($(OSTYPE),macos)
-CC = gcc -std=c99 -O2 -U__STRICT_ANSI__ -g -lm -lrt $(OS_CCDEFS) -I .
-else
-CC = gcc -std=c99 -O2 -U__STRICT_ANSI__ -g -lm $(OS_CCDEFS) -I .
-endif
+CC := ${CC} -std=c99 -U__STRICT_ANSI__ -lm -lrt $(OS_CCDEFS) -I .
 ifeq ($(USE_NETWORK),)
 else
-NETWORK_OPT = -DUSE_NETWORK -isystem /usr/local/include /usr/local/lib/libpcap.a
+NETWORK_OPT = -DUSE_NETWORK -DNEED_PCAP_SENDPACKET -lpcap
 endif
 else
 #Win32 Environments
 LDFLAGS = -lm -lwsock32 -lwinmm
-CC = gcc -std=c99 -U__STRICT_ANSI__ -O0 -I.
+CC := ${CC} -std=c99 -U__STRICT_ANSI__ -O0 -I.
 EXE = .exe
 ifeq ($(USE_NETWORK),)
 else
@@ -30,6 +26,8 @@ NETWORK_OPT = -DUSE_NETWORK -lwpcap -lpacket
 endif
 endif
 
+CC := ${CC} ${CPPFLAGS} ${CFLAGS}
+
 #
 # Common Libraries
 #