Bug#870232: flex FTBFS: dh_install: Cannot find (any matches for) "debian/tmp/include" (tried in ., debian/tmp)

[Helmut Grohne]

Source: flex
Version: 2.6.1-1.3
Severity: serious
User: ***@debian.org
Usertags: rebootstrap

flex fails to build from source in unstable amd64.

| dh_install
| dh_install: Cannot find (any matches for) "debian/tmp/include" (tried in ., debian/tmp)
|
| dh_install: libfl-dev missing files: debian/tmp/include
| dh_install: Cannot find (any matches for) "debian/tmp/lib" (tried in ., debian/tmp)
|
| dh_install: libfl-dev missing files: debian/tmp/lib
| dh_install: missing files, aborting
| debian/rules:43: recipe for target 'override_dh_install' failed
| make[1]: *** [override_dh_install] Error 25
| make[1]: Leaving directory '/<<PKGBUILDDIR>>'
| debian/rules:27: recipe for target 'binary-arch' failed
| make: *** [binary-arch] Error 2
| dpkg-buildpackage: error: fakeroot debian/rules binary-arch gave error exit status 2

I guess #813266 is the cause.

Helmut