i get this when trying a make build (with DESTDIR set to /usr/build)

cc -O2  -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-uninitialized   -I/usr/src/usr.bin/apropos/../man -nostdinc -idirafter /usr/build/usr/include -c /usr/src/usr.bin/apropos/../man/config.c
cc   -o /usr/src/usr.bin/apropos/../man/apropos -nostdlib -L/usr/build/usr/lib -Wl,-rpath-link,/usr/build/usr/lib /usr/build/usr/lib/crt0.o /usr/build/usr/lib/crtbegin.o apropos.o config.o  -lgcc -lc -lgcc /usr/build/usr/lib/crtend.o
/usr/bin/ld: cannot open output file /usr/src/usr.bin/apropos/../man/apropos: Is a directory
collect2: ld returned 1 exit status
*** Error code 1

Stop.
*** Error code 1

Stop.
*** Error code 1

Stop.
*** Error code 1

Stop.
*** Error code 1

Stop.
[dive@eros(/usr/src)|8]#