diff --git a/Makefile b/Makefile
index 81cb9ae..2a8348a 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,9 @@ export VERSION      := 0
 export SUBVERSION   := 8
 export MINORVERSION := 2-SNAPSHOT
 
+#export PREFIX := /usr
+export PREFIX ?= /usr/local
+
 all: nethogs decpcap_test test
 	$(MAKE) -C src -f MakeApp.mk $@
 	$(MAKE) -C src -f MakeLib.mk $@
@@ -16,13 +19,16 @@ check:
 install:
 	$(MAKE) -C src -f MakeApp.mk $@
 	$(MAKE) -C src -f MakeLib.mk $@
+	$(MAKE) -C doc $@
 
 install_dev:
 	$(MAKE) -C src -f MakeLib.mk $@
+	$(MAKE) -C doc $@
 
 uninstall:
 	$(MAKE) -C src -f MakeApp.mk $@
 	$(MAKE) -C src -f MakeLib.mk $@
+	$(MAKE) -C doc $@
 
 nethogs:
 	$(MAKE) -C src -f MakeApp.mk $@
diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
index 0000000..33fbab3
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,11 @@
+all:
+
+man8 := $(PREFIX)/share/man/man8
+
+install: nethogs.8
+	install -d -m 755 $(DESTDIR)$(man8)
+	install -m 644 nethogs.8 $(DESTDIR)$(man8)
+
+uninstall:
+	rm $(DESTDIR)$(man8)/nethogs.8 || true
+
diff --git a/src/MakeApp.mk b/src/MakeApp.mk
index f0d8040..68df097 100644
--- a/src/MakeApp.mk
+++ b/src/MakeApp.mk
@@ -1,8 +1,4 @@
-#prefix := /usr
-prefix := /usr/local
-
-sbin := $(prefix)/sbin
-man8 := $(prefix)/share/man/man8
+sbin := $(PREFIX)/sbin
 
 all: nethogs decpcap_test
 
@@ -21,19 +17,16 @@ NCURSES_LIBS?=-lncurses
 check:
 	@echo "Not implemented"
 
-install: nethogs nethogs.8
+install: nethogs
 	install -d -m 755 $(DESTDIR)$(sbin)
 	install -m 755 nethogs $(DESTDIR)$(sbin)
-	install -d -m 755 $(DESTDIR)$(man8)
-	install -m 644 nethogs.8 $(DESTDIR)$(man8)
 	@echo
 	@echo "Installed nethogs to $(DESTDIR)$(sbin)"
 	@echo
 	@echo "You might have to add this directory to your PATH and/or refresh your shells' path cache with a command like 'hash -r'."
 
 uninstall:
-	rm $(DESTDIR)$(sbin)/nethogs
-	rm $(DESTDIR)$(man8)/nethogs.8
+	rm $(DESTDIR)$(sbin)/nethogs || true
 
 nethogs: main.cpp nethogs.cpp $(OBJS)
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) main.cpp $(OBJS) -o nethogs -lpcap -lm ${NCURSES_LIBS} -DVERSION=\"$(VERSION)\" -DSUBVERSION=\"$(SUBVERSION)\" -DMINORVERSION=\"$(MINORVERSION)\"
diff --git a/src/MakeLib.mk b/src/MakeLib.mk
index 2a39a06..42c9d1e 100644
--- a/src/MakeLib.mk
+++ b/src/MakeLib.mk
@@ -2,9 +2,8 @@ LIBRARY=libnethogs.so
 LIBNAME=$(LIBRARY).$(LIBVERSION).$(LIBSUBVERSION).$(LIBMINORVERSION)
 SO_NAME=$(LIBRARY).$(LIBVERSION)
 
-prefix := /usr/local
-libdir := $(prefix)/lib
-incdir := $(prefix)/include
+libdir := $(PREFIX)/lib
+incdir := $(PREFIX)/include
 
 all: $(LIBNAME) libnethogs.a
 
@@ -45,7 +44,7 @@ install: $(LIBNAME)
 	install -d -m 755 $(DESTDIR)$(libdir)
 	install -m 755 $(LIBNAME) $(DESTDIR)$(libdir)
 	@echo "Installed $(LIBNAME) to $(DESTDIR)$(libdir)"
-	ldconfig
+	ldconfig || true
 
 install_dev: install
 	@ln -f -s $(DESTDIR)$(libdir)/$(LIBNAME) $(DESTDIR)$(libdir)/$(LIBRARY)
@@ -54,14 +53,14 @@ install_dev: install
 	install -d -m 755 $(DESTDIR)$(incdir)
 	install -m 755 libnethogs.h $(DESTDIR)$(incdir)
 	@echo "Installed libnethogs.h to $(DESTDIR)$(incdir)"
-	ldconfig
+	ldconfig || true
 
 uninstall:
 	rm -f $(DESTDIR)$(libdir)/$(LIBNAME)
 	rm -f $(DESTDIR)$(libdir)/$(LIBRARY)
 	rm -f $(DESTDIR)$(libdir)/libnethogs.a
 	rm -f $(DESTDIR)$(incdir)/libnethogs.h
-	ldconfig
+	ldconfig || true
 
 $(LIBNAME): $(OBJS)
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) $(OBJS) -o $@ -lpcap