==> Initializing the chroot...
==> Starting pre-build activities...
 |  ==> Downloading blacklist of proprietary software packages...done
 |  ==> WARNING: Using local copy of blacklist
 |    -> Inspecting package pkgname=expac-relative (4-3.parabola1)
==> Downloading sources...
 |  ==> Making package: expac-relative 4-3.parabola1 (Thu Jan  1 19:27:16 ART 2015)
 |  ==> Retrieving sources...
 |    -> Found expac-4.tar.gz
 |    -> Found expac-4.tar.gz.sig
 |    -> Found 0001-fix-target-processing.patch
 |    -> Found 0002-conf-always-trim-the-key-name.patch
 |  ==> Validating source files with md5sums...
 |      expac-4.tar.gz ... Passed
 |      expac-4.tar.gz.sig ... Skipped
 |      0001-fix-target-processing.patch ... Passed
 |      0002-conf-always-trim-the-key-name.patch ... Passed
 |  ==> Verifying source file signatures with gpg...
 |      expac-4.tar.gz ... Passed
==> Starting to build the package...
 |  ==> Making package: expac-relative 4-3.parabola1 (Thu Jan  1 19:27:17 ART 2015)
 |  ==> Checking runtime dependencies...
 |  ==> Checking buildtime dependencies...
 |  ==> Retrieving sources...
 |    -> Found expac-4.tar.gz
 |    -> Found expac-4.tar.gz.sig
 |    -> Found 0001-fix-target-processing.patch
 |    -> Found 0002-conf-always-trim-the-key-name.patch
 |  ==> Validating source files with md5sums...
 |      expac-4.tar.gz ... Passed
 |      expac-4.tar.gz.sig ... Skipped
 |      0001-fix-target-processing.patch ... Passed
 |      0002-conf-always-trim-the-key-name.patch ... Passed
 |  ==> Verifying source file signatures with gpg...
 |      expac-4.tar.gz ... FAILED (the public key 487EACC08557AD082088DABA1EB2638FF56C0C53 is not trusted)
 |  ==> ERROR: One or more PGP signatures could not be verified!
==> Copying log and package files out of the chroot...