gri@firefly:~> sudo port clean cctools-headers
--->  Cleaning cctools-headers
gri@firefly:~> sudo port -v upgrade cctools-headers
--->  Fetching archive for cctools-headers
--->  cctools-headers-836_0.darwin_9.noarch.tbz2 doesn't seem to exist in /opt/local/var/macports/incoming/verified
--->  Attempting to fetch cctools-headers-836_0.darwin_9.noarch.tbz2 from http://lil.fr.packages.macports.org/cctools-headers
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
--->  Attempting to fetch cctools-headers-836_0.darwin_9.noarch.tbz2 from http://mse.uk.packages.macports.org/sites/packages.macports.org/cctools-headers
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
--->  Attempting to fetch cctools-headers-836_0.darwin_9.noarch.tbz2 from http://packages.macports.org/cctools-headers
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
--->  Fetching distfiles for cctools-headers
--->  Verifying checksum(s) for cctools-headers
--->  Checksumming cctools-836.tar.gz
--->  Checksumming xnu-2050.18.24.tar.gz
Error: Checksum (rmd160) mismatch for xnu-2050.18.24.tar.gz
Portfile checksum: xnu-2050.18.24.tar.gz rmd160 e54a424b8b0dfe7d3a6f1305b64659d7b9e1ecbf
Distfile checksum: xnu-2050.18.24.tar.gz rmd160 0635d30a59d4ac06a742716a825f7e11a185e55f
Error: Checksum (sha256) mismatch for xnu-2050.18.24.tar.gz
Portfile checksum: xnu-2050.18.24.tar.gz sha256 5d018b33efd9eebb05142958432b9a5058febe04a3b92ba5a16a285490a83445
Distfile checksum: xnu-2050.18.24.tar.gz sha256 a63121d9b2c101a043a1725800d16b39a8537736e2f06c17f79336f020818184
The correct checksum line may be:
checksums           cctools-836.tar.gz \
                    rmd160  41c79e24a218f9257b644e63deaaa31c745d201d \
                    sha256  d3deea7dd5a3b81505e2531fc3473d8779ee88989dfd9239db401a18c8cfe5b3 \
                    xnu-2050.18.24.tar.gz \
                    rmd160  0635d30a59d4ac06a742716a825f7e11a185e55f \
                    sha256  a63121d9b2c101a043a1725800d16b39a8537736e2f06c17f79336f020818184
Error: org.macports.checksum for port cctools-headers returned: Unable to verify file checksums
Warning: targets not executed for cctools-headers: org.macports.install org.macports.checksum org.macports.extract org.macports.patch org.macports.configure org.macports.build org.macports.destroot
Please see the log file for port cctools-headers for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_cctools-headers/cctools-headers/main.log
Error: Unable to upgrade port: 1
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets