Use a date stamp for JANET_BUILD to avoid using git.
Fix installation.

Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -28,7 +28,7 @@ JANETCONF_HEADER?=src/conf/janetconf.h
 INCLUDEDIR?=$(PREFIX)/include
 BINDIR?=$(PREFIX)/bin
 LIBDIR?=$(PREFIX)/lib
-JANET_BUILD?="\"$(shell git log --pretty=format:'%h' -n 1 2> /dev/null || echo local)\""
+JANET_BUILD?="\"$(shell date +%Y%m%d)\""
 CLIBS=-lm -lpthread
 JANET_TARGET=build/janet
 JANET_BOOT=build/janet_boot
@@ -36,7 +36,7 @@ JANET_IMPORT_LIB=build/janet.lib
 JANET_LIBRARY=build/libjanet.so
 JANET_STATIC_LIBRARY=build/libjanet.a
 JANET_PATH?=$(LIBDIR)/janet
-JANET_MANPATH?=$(PREFIX)/share/man/man1/
+JANET_MANPATH?=$(PREFIX)/man/man1/
 JANET_PKG_CONFIG_PATH?=$(LIBDIR)/pkgconfig
 JANET_DIST_DIR?=janet-dist
 JANET_BOOT_FLAGS:=. JANET_PATH '$(JANET_PATH)'
@@ -311,7 +311,7 @@ install: $(JANET_TARGET) $(JANET_LIBRARY) $(JANET_STAT
 	strip '$(DESTDIR)$(BINDIR)/janet'
 	mkdir -p '$(DESTDIR)$(INCLUDEDIR)/janet'
 	cp -r build/janet.h '$(DESTDIR)$(INCLUDEDIR)/janet'
-	ln -sf ./janet/janet.h '$(DESTDIR)$(INCLUDEDIR)/janet.h'
+	cp -r '$(DESTDIR)$(INCLUDEDIR)/janet/janet.h' '$(DESTDIR)$(INCLUDEDIR)/janet.h'
 	mkdir -p '$(DESTDIR)$(JANET_PATH)'
 	mkdir -p '$(DESTDIR)$(LIBDIR)'
 	if test $(UNAME) = Darwin ; then \
@@ -319,9 +319,7 @@ install: $(JANET_TARGET) $(JANET_LIBRARY) $(JANET_STAT
 		ln -sf $(SONAME) '$(DESTDIR)$(LIBDIR)/libjanet.dylib' ; \
 		ln -sf libjanet.$(shell $(JANET_TARGET) -e '(print janet/version)').dylib $(DESTDIR)$(LIBDIR)/$(SONAME) ; \
 	else \
-		cp $(JANET_LIBRARY) '$(DESTDIR)$(LIBDIR)/libjanet.so.$(shell $(JANET_TARGET) -e '(print janet/version)')' ; \
-		ln -sf $(SONAME) '$(DESTDIR)$(LIBDIR)/libjanet.so' ; \
-		ln -sf libjanet.so.$(shell $(JANET_TARGET) -e '(print janet/version)') $(DESTDIR)$(LIBDIR)/$(SONAME) ; \
+		cp $(JANET_LIBRARY) '$(DESTDIR)$(LIBDIR)/' ; \
 	fi
 	cp $(JANET_STATIC_LIBRARY) '$(DESTDIR)$(LIBDIR)/libjanet.a'
 	mkdir -p '$(DESTDIR)$(JANET_MANPATH)'
@@ -329,7 +327,6 @@ install: $(JANET_TARGET) $(JANET_LIBRARY) $(JANET_STAT
 	mkdir -p '$(DESTDIR)$(JANET_PKG_CONFIG_PATH)'
 	cp build/janet.pc '$(DESTDIR)$(JANET_PKG_CONFIG_PATH)/janet.pc'
 	cp '$(JANET_IMPORT_LIB)' '$(DESTDIR)$(LIBDIR)' || echo 'no import lib to install (mingw only)'
-	[ -z '$(DESTDIR)' ] && $(LDCONFIG) || echo "You can ignore this error for non-Linux systems or local installs"
 
 install-jpm-git: $(JANET_TARGET)
 	mkdir -p build