Created a .deb, but running the image just drops to a REPL

[vindarel <vindarel@mailz.org>]

Hello dear lispers,

I delved into the topic and created my first .deb package. I installed
it and all seems well, except that when I run my program, I am dropped
to a REPL instead :S

To be fair there's a remaining error at the end of the process:

sudo debuild -us -uc
[…]
make[1]: Leaving directory '/home/vince/work/next'
   dh_link
   dh_strip_nondeterminism
   dh_compress
   dh_fixperms
   dh_missing
   dh_strip
   dh_makeshlibs
   dh_shlibdeps
   dh_installdeb
   dh_gencontrol
   dh_md5sums
   dh_builddeb
dpkg-deb: building package 'next-dbgsym' in
'debian/.debhelper/scratch-space/build-next/next-dbgsym_1.3.1_amd64.deb'.
dpkg-deb: building package 'next' in '../next_1.3.1_amd64.deb'.
    Renaming next-dbgsym_1.3.1_amd64.deb to next-dbgsym_1.3.1_amd64.ddeb
 dpkg-genbuildinfo
dpkg-genbuildinfo: error: badly formed line in files list file, line 2
dpkg-buildpackage: error: dpkg-genbuildinfo subprocess returned exit
status 25
debuild: fatal error at line 1152:
dpkg-buildpackage -rfakeroot -us -uc -ui failed


It does create a .deb, but it seems that genbuildinfo happens inside
dpkg-deb, so that sounds important.

I also have no clues about this error. Would you mind reviewing my recipe ?
I am trying to package the Next browser. You can view the files here:
https://github.com/atlas-engineer/next/tree/vindarel/debian-package/debian

My rule files:

---
#!/usr/bin/make -f
DH_VERBOSE = 1

%:
    dh $@

override_dh_auto_build:
    $(MAKE)    all

# XXX: avoid "desktop is not a directory" error.
override_dh_usrlocal:
    echo
---

The control file:

---
Source: next
Maintainer: Next developers <hello@atlas.engineer>
Section: Web Software
Priority: extra
Standards-Version: 1.3.1
Build-Depends: debhelper (>= 8.0.0)

Package: next
Architecture: any
Priority: extra
Homepage: http://next.atlas.engineer/
Depends: sbcl (>= 1.4.2),
         ${shlibs:Depends},
     libwebkit2gtk-4.0-dev (>= 2.24),
         default-dbus-session-bus | dbus-session-bus,
         glib-networking,
         sqlite,
         gsettings-desktop-schemas,
         libfixposix-dev,
         libgstreamer1.0-0,
         gir1.2-gst-plugins-base-1.0,
         xclip,
         ${misc:Depends}
Description: Next, the infinitely extensible web browser.
  Next is the programmable web browser. All the browser logic is
accessible and modifiable live with the Lisp language. This package
provides the Webkit webview. See the downloads page for a
Webengine/Blink platform port.

---

I also pasted the full output of my build here:
https://github.com/atlas-engineer/next/issues/338

Thank you