error compiling qmail-src

[Luis Gustavo Madrigal <gmadrigal-deb@azulelectrico.com>]

Hi,

I'm trying to compile qmail-src_1.03-17_all.deb under debian 2.2r2 with a 
kernel 2.4.0.
I typed build-qmail and then it started to compile just fine, but after a few 
seconds I got this error:

/load qmail-remote control.o constmap.o timeoutread.o \
timeoutwrite.o timeoutconn.o tcpto.o now.o dns.o ip.o \
ipalloc.o ipme.o quote.o ndelay.a case.a sig.a open.a \
lock.a seek.a getln.a stralloc.a alloc.a substdio.a error.a \
str.a fs.a auto_qmail.o  `cat dns.lib` `cat socket.lib`
dns.o: In function `resolve':
dns.o(.text+0x1d3): undefined reference to `dn_expand'
dns.o: In function `findname':
dns.o(.text+0x272): undefined reference to `dn_expand'
dns.o(.text+0x2ea): undefined reference to `dn_expand'
dns.o: In function `findip':
dns.o(.text+0x36b): undefined reference to `dn_expand'
dns.o: In function `findmx':
dns.o(.text+0x462): undefined reference to `dn_expand'
dns.o(.text+0x4fc): more undefined references to `dn_expand' follow
dns.o: In function `dns_init':
dns.o(.text+0x53f): undefined reference to `res_init'
dns.o(.text+0x54d): undefined reference to `res_search'
dns.o(.data+0x10): undefined reference to `res_query'
collect2: ld returned 1 exit status
make[1]: *** [qmail-remote] Error 1
make[1]: Leaving directory `/tmp/qmail/qmail-1.03'
make: *** [build] Error 2

What am I missing? I know I'm able to see dn_expand man page.

How can I get qmail to work?  

Thanks!