There is are 2 errors in your PKG_PATH. It should be:
Code:
PKG_PATH="http://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/x86_64/6.0/All/"
"All is with a capital
A and lower case
L's. The 2nd instance of NetBSD is also case sensitive while the first instance (netbsd) is all lower case.
You can verify the correct path by using the builtin ftp client:
ftp -a ftp.netbsd.org.
If you are in Germany you might want to consider the pkgsrc repository in France (closer).
ftp -a ftp.fr.netbsd.org.