diff --git a/Makefile b/Makefile
index 57813ce..a3b1e87 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,9 @@
-CXX := c++
-CXXFLAGS := -Wall -pedantic -Wno-long-long -O2
-LDFLAGS :=
-PREFIX := /usr/local
+CXXFLAGS ?= -Wall -pedantic -Wno-long-long -O2
+PREFIX ?= /usr/local
+BINDIR ?= $(PREFIX)/bin
+MANDIR ?= $(PREFIX)/share/man
+
+HAS_DOCBOOK ?= no
 
 OBJFILES = \
     git-crypt.o \
@@ -17,18 +19,71 @@ OBJFILES = \
 OBJFILES += crypto-openssl.o
 LDFLAGS += -lcrypto
 
-all: git-crypt
+DOCBOOK = xsltproc \
+	--param man.output.in.separate.dir 1 \
+	--stringparam man.output.base.dir man/ \
+	--param man.output.subdirs.enabled 1 \
+	--param man.authors.section.enabled 1 \
+	--nonet \
+	http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl
+
+all: build
+
+#
+# Build
+#
+BUILD_MAN_TARGETS-yes = build-man
+BUILD_MAN_TARGETS-no =
+BUILD_TARGETS := build-bin $(BUILD_MAN_TARGETS-$(HAS_DOCBOOK))
+
+build: $(BUILD_TARGETS)
+
+build-bin: git-crypt
 
 git-crypt: $(OBJFILES)
 	$(CXX) $(CXXFLAGS) -o $@ $(OBJFILES) $(LDFLAGS)
 
 util.o: util.cpp util-unix.cpp util-win32.cpp
+coprocess.o: coprocess.cpp coprocess-unix.cpp coprocess-win32.cpp
 
-clean:
-	rm -f *.o git-crypt
+build-man: man/man1/git-crypt.1
 
-install: git-crypt
-	install -d $(DESTDIR)$(PREFIX)/bin/
-	install -m 755 git-crypt $(DESTDIR)$(PREFIX)/bin/
+man/man1/git-crypt.1: man/git-crypt.xml
+	$(DOCBOOK) $<
 
-.PHONY: all clean install
+#
+# Clean
+#
+CLEAN_MAN_TARGETS-yes = clean-man
+CLEAN_MAN_TARGETS-no =
+CLEAN_TARGETS := clean-bin $(CLEAN_MAN_TARGETS-$(HAS_DOCBOOK))
+
+clean: $(CLEAN_TARGETS)
+
+clean-bin:
+	rm -f $(OBJFILES) git-crypt
+
+clean-man:
+	rm -f man/man1/git-crypt.1
+
+#
+# Install
+#
+INSTALL_MAN_TARGETS-yes = install-man
+INSTALL_MAN_TARGETS-no =
+INSTALL_TARGETS := install-bin $(INSTALL_MAN_TARGETS-$(HAS_DOCBOOK))
+
+install: $(INSTALL_TARGETS)
+
+install-bin: build-bin
+	install -d $(DESTDIR)$(BINDIR)
+	install -m 755 git-crypt $(DESTDIR)$(BINDIR)/
+
+install-man: build-man
+	install -d $(DESTDIR)$(MANDIR)/man1
+	install -m 644 man/man1/git-crypt.1 $(DESTDIR)$(MANDIR)/man1/
+
+.PHONY: all \
+	build build-bin build-man \
+	clean clean-bin clean-man \
+	install install-bin install-man
diff --git a/man/man1/.gitignore b/man/man1/.gitignore
new file mode 100644
index 0000000..9f42105
--- /dev/null
+++ b/man/man1/.gitignore
@@ -0,0 +1 @@
+git-crypt.1