error.txt

Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 dependent-dummy : Depends: dependency-dummy (= 1) but 2 is to be installed
E: Broken packages

test.sh

#!/bin/sh

REPO=/var/local-repo
sudo mkdir $REPO

cat - > dependency-1 << ENDL
Section: misc
Priority: optional
Standards-Version: 3.6.2
Package: dependency-dummy
Version: 1
ENDL

cat - > dependency-2 << ENDL
Section: misc
Priority: optional
Standards-Version: 3.6.2
Package: dependency-dummy
Version: 2
ENDL

cat - > dependent-1 << ENDL
Section: misc
Priority: optional
Standards-Version: 3.6.2
Package: dependent-dummy
Version: 1
Depends: dependency-dummy (= 1)
ENDL

equivs-build dependency-1
equivs-build dependency-2
equivs-build dependent-1

sudo cp *.deb $REPO

dpkg-scanpackages -m $REPO | sudo tee $REPO/Packages > /dev/null

echo "Add the following to your sources.list:"
echo "deb file:$REPO ./"
echo "Next try: "
echo "apt-get update; apt-get install dependent-dummy"