Run of scrub-obsolete for exim4

Try this locally (using the lintian-brush package):

debcheckout exim4
cd exim4
deb-scrub-obsolete
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Purging /build/-4RphQ7
Not cleaning session: cloned chroot in use
E: Failed to fetch source files

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| Summary                                                                      |
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Build Architecture: amd64

Full worker log Full build log