I had the same issue installing Zenmap in kali linux.
Package build failed. Here's the log:
dh: error: specify a sequence to run make:
*** [debian/rules:7: binary] Error 25
To solve this, I had to downgrade to Alien version 8.90, since I was using 8.95.3
There is some information online, and it's also detailed in the changelogs as well, explaining some changes performed on the latest alien updates and how they read the dh headers. Zenmap.rpm packages seem to be non-compilant with these updates.
I downgraded to a different Alien version to skip these dh verification changes.
To do so, I uninstalled the current alien version with
apt-get remove alien
Then, from https://pkgs.org/download/alien I downloaded Ubuntu Main amd64 Official alien_8.90_all.deb
installed with: dpkg -i alien_8.90_all.deb
Downloaded the latest Zenmap rpm version here
https://nmap.org/dist
and successfully converted rpm to deb running
alien zenmap-X.XX.noarch.rpm
Once the RPM was converted to .deb, you could run
dpkg -i zenmap-X.XX.noarch.deb
App would not open, running from CLI I figured that some python libs failed to load
Could not import the zenmapGUI.App module: 'No module named gtk'. I
checked in these directories:
/usr/bin
/usr/share/offsec-awae-wheels/colorama-0.4.3-py2.py3-none-any.whl
/usr/share/offsec-awae-wheels/pyOpenSSL-19.1.0-py2.py3-none-any.whl
...
As suggested in this post I download the packages:
wget http://archive.ubuntu.com/ubuntu/pool/universe/p/pygtk/python-gtk2_2.24.0-5.1ubuntu2_amd64.deb
wget http://azure.archive.ubuntu.com/ubuntu/pool/universe/p/pygobject-2/python-gobject-2_2.28.6-14ubuntu1_amd64.deb
wget http://security.ubuntu.com/ubuntu/pool/universe/p/pycairo/python-cairo_1.16.2-2ubuntu2_amd64.deb
Then installed with dpkg
dpkg -i python-gtk2_2.24.0-5.1ubuntu2_amd64.deb
dpkg -i python-gobject-2_2.28.6-14ubuntu1_amd64.deb
dpkg -i python-cairo_1.16.2-2ubuntu2_amd64.deb
Now Zenmap is working beautifully.