Do a make clean wherever it is sensible

pkgs/dvtm

@@ -5,6 +5,7 @@ build: ncurses
 	wget -c $url
 	[ -d dvtm-$v ] || tar -xzf dvtm-$v.tar.gz
 	cd dvtm-$v
+	make clean
 	sed -i "s@PREFIX = /usr/local@PREFIX = /@" config.mk
 	sed -i "s@INCS = -I. -I/usr/include -I/usr/local/include@INCS = -I. -I$libcroot/include -I$libcroot/include/ncursesw@" config.mk
 	sed -i "s@LDFLAGS += -L/usr/lib -L/usr/local/lib ${LIBS}@LDFLAGS += -L$libcroot/lib ${LIBS} -static @" config.mk

pkgs/dwm

@@ -3,6 +3,7 @@ build: tinyxlib
 	cd src
 	wget -c $url
 	[ -d dwm ] || tar xzf dwm-git.tar.gz
+	make -C dwm clean
 	sed -i "s@X11INC = /usr/X11R6/include@X11INC = $libcroot/include @" dwm/config.mk
 	sed -i "s@X11LIB = /usr/X11R6/lib@X11LIB = $libcroot/lib @" dwm/config.mk
 	sed -i 's@LDFLAGS  = -s ${LIBS}@LDFLAGS = -s ${LIBS} -static @' dwm/config.mk

pkgs/uuterm

@@ -4,5 +4,6 @@ build: tinyxlib
 	wget -c $url
 	[ -d uuterm ] || tar xzf uuterm.tar.gz
 	cd uuterm
+	make clean
 	make CC=$CC LDFLAGS_X11="-L$libcroot/lib -static" uuterm-x11 || return 1
 	cp uuterm-x11 "$root/bin"