DESTDIR is the correct name

prospero/server/Makefile.in

@@ -73,10 +73,10 @@ shadowcvt: shadowcvt.o cvt_v1_ltype.o $(SRV_LIBS_DEPENDENCIES)
 
 install:
 	-for i in ${SPECIAL_PROGS} ${MORE_SERVER_PROGS}; do \
-	    ${INSTALL} -c  -m 755 -o ${OWNER} -g ${GROUP} $$i ${DISTDIR}/${P_BINARIES}/$$i${GENERATIONSUFFIX}; \
-	    ${GENERATION} ${DISTDIR}/${P_BINARIES}/$$i ; \
+	    ${INSTALL} -c  -m 755 -o ${OWNER} -g ${GROUP} $$i ${P_BINARIES}/$$i${GENERATIONSUFFIX}; \
+	    ${GENERATION} ${P_BINARIES}/$$i ; \
     	done 
-	-chmod 6755 ${DISTDIR}/${P_BINARIES}/pstart 
+	-chmod 6755 ${P_BINARIES}/pstart 
 
 # Dependencies
 cvt_v1_ltype.o : ../include/pserver.h \