# 
# deb cdrom:[Debian GNU/Linux testing _Etch_ - Official Beta i386 CD Binary-1 20070317-21:45]/ etch contrib main

#deb cdrom:[Debian GNU/Linux testing _Etch_ - Official Beta i386 CD Binary-1 20070317-21:45]/ etch contrib main

# Line commented out by installer because it failed to verify:
#deb http://security.debian.org/ etch/updates main contrib
# Line commented out by installer because it failed to verify:
#deb-src http://security.debian.org/ etch/updates main contrib



#deb http://ftp2.de.debian.org/debian stable main contrib non-free
#deb ftp://ftp.iitm.ac.in/debian stable main contrib non-free

deb-src ftp://ftp.iitm.ac.in/debian testing main contrib non-free


After doing this in terminal i run apt-get build-dep apt-cacher;apt-get -b source apt-cacher

then the result is as follows

debian:/home/bharat#  apt-get build-dep apt-cacher;apt-get -b source apt-cacher;Reading package lists... Done
Building dependency tree... Done
E: Build-Depends dependency for apt-cacher cannot be satisfied because no available versions of package debhelper can satisfy version requirements
Reading package lists... Done
Building dependency tree... Done
Skipping already downloaded file 'apt-cacher_1.5.5.dsc'
Skipping already downloaded file 'apt-cacher_1.5.5.tar.gz'
Need to get 0B of source archives.
Skipping unpack of already unpacked source in apt-cacher-1.5.5
dpkg-buildpackage: source package is apt-cacher
dpkg-buildpackage: source version is 1.5.5
dpkg-buildpackage: source changed by Mark Hindley <mark@hindley.org.uk>
sh: gcc: command not found
dpkg-architecture: warning: Couldn't determine gcc system type, falling back to default (native compilation)
sh: gcc: command not found
dpkg-architecture: warning: Couldn't determine gcc system type, falling back to default (native compilation)
dpkg-buildpackage: host architecture i386
dpkg-buildpackage: source version without epoch 1.5.5
sh: gcc: command not found
dpkg-architecture: warning: Couldn't determine gcc system type, falling back to default (native compilation)
sh: gcc: command not found
dpkg-architecture: warning: Couldn't determine gcc system type, falling back to default (native compilation)
sh: gcc: command not found
dpkg-architecture: warning: Couldn't determine gcc system type, falling back to default (native compilation)
dpkg-checkbuilddeps: Unmet build dependencies: debhelper (>> 4.0.0)
dpkg-buildpackage: Build dependencies/conflicts unsatisfied; aborting.
dpkg-buildpackage: (Use -d flag to override.)
Build command 'cd apt-cacher-1.5.5 && dpkg-buildpackage -b -uc' failed.
E: Child process failed