Turns out that dehbelper does not install the package on its own so we have to deal with it manually.
@@ -9,5 +9,6 @@ override_dh_auto_install:
make install PREFIX=/usr DESTDIR=debian/tmp
override_dh_auto_test:
+ make install PREFIX=/usr DESTDIR=debian/tmp
make test \
SHELLFU_PATH=$(shell pwd)/debian/tmp/usr/share/shellfu/include-bash