Comment 1 for bug 1697208

Possibly related. On trying to install Karbon (Kubuntu 18.04.1) I get the following error

Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  calligra-data calligra-libs calligrasheets calligrastage calligrastage-data calligrawords calligrawords-data libemf1 libmagick++-6.q16-7
  libplot2c2 libpstoedit0c2a libspnav0 okular-backend-odp okular-backend-odt pstoedit
Suggested packages:
  texlive wordnet spacenavd xfig | ivtools-bin | tgif | transfig
Recommended packages:
  libqca2-plugin-ossl
The following NEW packages will be installed:
  calligra-data calligra-libs calligrasheets calligrastage calligrastage-data calligrawords calligrawords-data karbon libemf1
  libmagick++-6.q16-7 libplot2c2 libpstoedit0c2a libspnav0 okular-backend-odp okular-backend-odt pstoedit
0 to upgrade, 16 to newly install, 0 to remove and 0 not to upgrade.
Need to get 3,052 kB/34.7 MB of archives.
After this operation, 125 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://au.archive.ubuntu.com/ubuntu bionic/universe amd64 calligrasheets amd64 1:3.0.1-0ubuntu4 [3,052 kB]
Err:1 http://au.archive.ubuntu.com/ubuntu bionic/universe amd64 calligrasheets amd64 1:3.0.1-0ubuntu4
  Hash Sum mismatch
  Hashes of expected file:
   - SHA256:7c684f3b7f2179a46a54ab9360edcf6595e24860f1768bf447aa0609fff77a3c
   - SHA1:e389eeab918151f8ef7af059b0f1880e4901d400 [weak]
   - MD5Sum:c6f5158bbec17f3f2e8dc3813e5f379d [weak]
   - Filesize:3051608 [weak]
  Hashes of received file:
   - SHA256:b6ce1f7a3fc3713447361b9db25b5334084082f5d87078aae26816f80887a8f2
   - SHA1:41caf106ae4d92b9003994dee65a68fff98871c2 [weak]
   - MD5Sum:b198b90fb1ff12d391a1c80778c4049c [weak]
   - Filesize:3051608 [weak]
  Last modification reported: Tue, 27 Feb 2018 02:18:27 +0000
Fetched 3,052 kB in 3s (962 kB/s)
E: Failed to fetch http://au.archive.ubuntu.com/ubuntu/pool/universe/c/calligra/calligrasheets_3.0.1-0ubuntu4_amd64.deb Hash Sum mismatch
   Hashes of expected file:
    - SHA256:7c684f3b7f2179a46a54ab9360edcf6595e24860f1768bf447aa0609fff77a3c
    - SHA1:e389eeab918151f8ef7af059b0f1880e4901d400 [weak]
    - MD5Sum:c6f5158bbec17f3f2e8dc3813e5f379d [weak]
    - Filesize:3051608 [weak]
   Hashes of received file:
    - SHA256:b6ce1f7a3fc3713447361b9db25b5334084082f5d87078aae26816f80887a8f2
    - SHA1:41caf106ae4d92b9003994dee65a68fff98871c2 [weak]
    - MD5Sum:b198b90fb1ff12d391a1c80778c4049c [weak]
    - Filesize:3051608 [weak]
   Last modification reported: Tue, 27 Feb 2018 02:18:27 +0000