```
make DESTDIR=xxx install
```
Fails when building with latest git master (commit 84fcd8e6eb7e0786399e1f6461c3f60b0db2d070) :
```
/usr/bin/install: cannot create regular file '/usr/lib/gnupg/keyboxd': Permission denied
```
The build user has no write permission to root dir - obviously it should be installing instead to <xxx>/usr/lib/gnupg/keyboxd
Commit ca54d3f148933baac1f0243f76e4961abca285b1 works fine.