--- hot-babe-0.4/Makefile
+++ hot-babe-0.4/Makefile
@@ -1,14 +1,14 @@
 PREFIX := /usr/local
 
 # optimization cflags
-CFLAGS += -O2 -Wall -Wextra -DPREFIX=\"$(PREFIX)\" -g
-CFLAGS += `pkg-config gdk-3.0 --cflags` -std=gnu99
+CFLAGS += -DPREFIX=\"$(PREFIX)\"
+CFLAGS += $(shell pkg-config gdk-3.0 --cflags) -std=gnu99
 CFLAGS += -Wno-unused-parameter -Wno-missing-field-initializers 
 CFLAGS += -Wno-sign-compare
 
 OBJS = hot-babe.o loader.o
 CC = gcc
-LIBS = `pkg-config gdk-3.0 --libs`
+LIBS = $(shell pkg-config gdk-3.0 --libs) -lm
 
 DOC = ChangeLog NEWS LICENSE CONTRIBUTORS copyright config.example
 
@@ -25,8 +25,8 @@
 	install -m 0755 hot-babe $(DESTDIR)$(PREFIX)/bin
 	install -d $(DESTDIR)$(PREFIX)/share/hot-babe/hb01
 	install -m 0644 hb01/* $(DESTDIR)$(PREFIX)/share/hot-babe/hb01
-	install -d $(DESTDIR)$(PREFIX)/share/doc/hot-babe
-	install -m 0644 $(DOC) $(DESTDIR)$(PREFIX)/share/doc/hot-babe
+	install -d $(DESTDIR)$(PREFIX)/share/doc/$(PF)
+	install -m 0644 $(DOC) $(DESTDIR)$(PREFIX)/share/doc/$(PF)
 	install -d $(DESTDIR)$(PREFIX)/share/man/man1
 	install -m 0644 hot-babe.1 $(DESTDIR)$(PREFIX)/share/man/man1
 	install -d $(DESTDIR)$(PREFIX)/share/pixmaps