Bug#911406: jsonm FTBFS: dh_installdocs: Cannot find (any matches for) "README" (tried in .)

[Helmut Grohne <helmut@subdivi.de>]

Source: jsonm
Version: 1.0.1-1
Severity: serious
Tags: ftbfs

jsonm fails to build from source in sbuild on unstable/amd64. A build
log ends with:

|    debian/rules override_dh_auto_install
| make[1]: Entering directory '/<<PKGBUILDDIR>>'
| mkdir -p '/<<PKGBUILDDIR>>/debian/tmp//usr/lib/ocaml/jsonm'
| cp _build/src/jsonm.cmi _build/src/jsonm.cma _build/src/jsonm.a _build/src/jsonm.cmx _build/src/jsonm.cmxa _build/src/jsonm.cmxs pkg/META src/jsonm.mli '/<<PKGBUILDDIR>>/debian/tmp//usr/lib/ocaml/jsonm'
| make[1]: Leaving directory '/<<PKGBUILDDIR>>'
|    debian/rules override_dh_install
| make[1]: Entering directory '/<<PKGBUILDDIR>>'
| dh_install --fail-missing
| dh_install: Compatibility levels before 9 are deprecated (level 8 in use)
| dh_install: Please use dh_missing --list-missing/--fail-missing instead
| dh_install: This feature will be removed in compat 12.
| make[1]: Leaving directory '/<<PKGBUILDDIR>>'
|    dh_ocamldoc
| Warning: Element Pervasives.float_of_string not found
| Warning: Element Sys.max_string_length not found
| Warning: Element Pervasives.nan not found
| Warning: Element Pervasives.infinity not found
| Warning: Element Pervasives.neg_infinity not found
|    dh_installdocs
| dh_installdocs: Compatibility levels before 9 are deprecated (level 8 in use)
| dh_installdocs: Cannot find (any matches for) "README" (tried in .)
| 
| make: *** [debian/rules:21: binary] Error 2
| dpkg-buildpackage: error: fakeroot debian/rules binary subprocess returned exit status 2

Helmut