Broken APT -- how to fix this?

[Robert Heller]

While upgrading some MXE packages, apt seems to have gotten itself into a 
broken state.  How do I fix this (I have *already* tried 'sudo apt 
--fix-broken install')?

Here is the log:

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Reading package lists...
Building dependency tree...
Reading state information...
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  mxe-i686-w64-mingw32.static-blas mxe-i686-w64-mingw32.static-cblas
  mxe-i686-w64-mingw32.static-lapack mxe-i686-w64-mingw32.static-libidn
  mxe-x86-64-unknown-linux-gnu-autoconf mxe-x86-64-unknown-linux-gnu-automake
  mxe-x86-64-unknown-linux-gnu-cloog mxe-x86-64-unknown-linux-gnu-cmake
  mxe-x86-64-unknown-linux-gnu-geoip-database
  mxe-x86-64-unknown-linux-gnu-gettext mxe-x86-64-unknown-linux-gnu-gmp
  mxe-x86-64-unknown-linux-gnu-googlemock
  mxe-x86-64-unknown-linux-gnu-googletest mxe-x86-64-unknown-linux-gnu-isl
  mxe-x86-64-unknown-linux-gnu-libiconv mxe-x86-64-unknown-linux-gnu-libtool
  mxe-x86-64-unknown-linux-gnu-lzma mxe-x86-64-unknown-linux-gnu-m4
  mxe-x86-64-unknown-linux-gnu-mpc mxe-x86-64-unknown-linux-gnu-mpfr
  mxe-x86-64-unknown-linux-gnu-mxe-conf mxe-x86-64-unknown-linux-gnu-patch
  mxe-x86-64-unknown-linux-gnu-pkgconf mxe-x86-64-unknown-linux-gnu-protobuf
  mxe-x86-64-unknown-linux-gnu-ragel mxe-x86-64-unknown-linux-gnu-ucl
  mxe-x86-64-unknown-linux-gnu-upx mxe-x86-64-unknown-linux-gnu-waf
  mxe-x86-64-unknown-linux-gnu-yasm mxe-x86-64-unknown-linux-gnu-zlib scons
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  mxe-x86-64-pc-linux-gnu-cmake-conf mxe-x86-64-pc-linux-gnu-mxe-conf
The following NEW packages will be installed:
  mxe-x86-64-pc-linux-gnu-cmake-conf mxe-x86-64-pc-linux-gnu-mxe-conf
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
143 not fully installed or removed.
Need to get 0 B/17.1 kB of archives.
After this operation, 106 kB of additional disk space will be used.
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(Reading database ... 176772 files and directories currently installed.)
Preparing to unpack .../mxe-x86-64-pc-linux-gnu-mxe-conf_1-bionic-build-2021-01-10_amd64.deb ...
Unpacking mxe-x86-64-pc-linux-gnu-mxe-conf (1-bionic-build-2021-01-10) ...
dpkg: error processing archive /var/cache/apt/archives/mxe-x86-64-pc-linux-gnu-mxe-conf_1-bionic-build-2021-01-10_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/mxe/usr/bin/config.guess', which is also in package mxe-x86-64-unknown-linux-gnu-mxe-conf 1-20170208
Preparing to unpack .../mxe-x86-64-pc-linux-gnu-cmake-conf_1-bionic-build-2021-01-10_amd64.deb ...
Unpacking mxe-x86-64-pc-linux-gnu-cmake-conf (1-bionic-build-2021-01-10) ...
dpkg: error processing archive /var/cache/apt/archives/mxe-x86-64-pc-linux-gnu-cmake-conf_1-bionic-build-2021-01-10_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/mxe/usr/share/cmake/modules/FindFreetype.cmake', which is also in package mxe-x86-64-unknown-linux-gnu-mxe-conf 1-20170208
Errors were encountered while processing:
 /var/cache/apt/archives/mxe-x86-64-pc-linux-gnu-mxe-conf_1-bionic-build-2021-01-10_amd64.deb
 /var/cache/apt/archives/mxe-x86-64-pc-linux-gnu-cmake-conf_1-bionic-build-2021-01-10_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


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