make DESTDIR uses /usr/

[z0rti]

Expected behavior

when i do make DESTDIR=/opt/veracrypt i would expect it to install the binary into /opt/veracrypt/bin/veracrypt (i may be wrong, in this case sorry :-)

Observed behavior

the binary is installed in /opt/veracrypt/usr/bin/veracrypt

Steps to reproduce

1. make
2. make DESTDIR=/opt/veracrypt

(Linux/bash)

There is a Makefile, but is cmake usable? Maybe there is an optione for cmake?