We use `dpkg` 1.19.2 since 23661254e4.
This version dropped pkg_db_reset` in `<dpkg/dpkg_db.h>` which broke compilation with the
following errors:
```
/build/source/osquery/tables/system/linux/deb_packages.cpp: In function 'void osquery::tables::dpkg_setup(pkg_array*)':
/build/source/osquery/tables/system/linux/deb_packages.cpp:83:3: error: 'pkg_array_init_from_db' was not declared in this scope
pkg_array_init_from_db(packages);
^~~~~~~~~~~~~~~~~~~~~~
/build/source/osquery/tables/system/linux/deb_packages.cpp:83:3: note: suggested alternative: 'pkg_array_init_from_hash'
pkg_array_init_from_db(packages);
^~~~~~~~~~~~~~~~~~~~~~
pkg_array_init_from_hash
/build/source/osquery/tables/system/linux/deb_packages.cpp: In function 'void osquery::tables::dpkg_teardown(pkg_array*)':
/build/source/osquery/tables/system/linux/deb_packages.cpp:93:3: error: 'pkg_db_reset' was not declared in this scope
pkg_db_reset();
^~~~~~~~~~~~
/build/source/osquery/tables/system/linux/deb_packages.cpp:93:3: note: suggested alternative: 'pkg_hash_reset'
pkg_db_reset();
^~~~~~~~~~~~
pkg_hash_reset
make[2]: *** [osquery/tables/CMakeFiles/osquery_system_tables.dir/build.make:115: osquery/tables/CMakeFiles/osquery_system_tables.dir/system/linux/deb_packages.cpp.o] Error 1
```
As there's currently no upstream fix, it's better to use an older
version of `dpkg` for now.
The build missed `openssl` as input and failed with an error like this:
```
/nix/store/7n1h80xkbjhcijzp0iylk0nc7w05vy8k-net-snmp-5.8/include/net-snmp/library/scapi.h:14:10: fatal error: openssl/ossl_typ.h: No such file or directory
#include <openssl/ossl_typ.h> /* EVP_MD */
^~~~~~~~~~~~~~~~~~~~
compilation terminated.
```
This also unbreaks `osquery` (https://hydra.nixos.org/build/88547811).
See also https://hydra.nixos.org/build/88562937
Use the system `libffi` (`ie` nixpkgs's) instead of built-in libffi
from ghc source tree.
This will prevent library conflict when ghc dynamically links haskell
packages (linked with ghc built-in libffi) and any external library
which uses nixpkgs `libffi`.
Closes https://github.com/NixOS/nixpkgs/pull/55208.
* python.pkgs.matplotlib: add numpy 1.6 compat patch
Numpy deprecated asscalar in 1.16. This will be fixed in the next
matplotlib version, but to avoid deprecation warnings (and because they
are breaking the sage testsuite), it can't hurt to backport the fix
already.
Upstream: https://github.com/matplotlib/matplotlib/pull/12478
* sage: add numpy 1.16 compatibility patch
https://trac.sagemath.org/ticket/27000
