alot: fix ModuleNotFoundError of '_notmuch_config'

pkgs/applications/networking/mailreaders/alot/notmuch.nix

@@ -14,6 +14,12 @@ buildPythonPackage {
 
   buildInputs = [ python notmuch cffi ];
 
+  # since notmuch 0.35, this package expects _notmuch_config.py that is
+  # generated by notmuch's configure script
+  postPatch = ''
+    cp ${notmuch.bindingconfig}/_notmuch_config.py .
+  '';
+
   # no tests
   doCheck = false;
   pythonImportsCheck = [ "notmuch2" ];

pkgs/applications/networking/mailreaders/notmuch/default.nix

@@ -62,7 +62,12 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
   makeFlags = [ "V=1" ];
 
-  outputs = [ "out" "man" "info" ]
+  postConfigure = ''
+    mkdir ${placeholder "bindingconfig"}
+    cp bindings/python-cffi/_notmuch_config.py ${placeholder "bindingconfig"}/
+  '';
+
+  outputs = [ "out" "man" "info" "bindingconfig" ]
     ++ lib.optional withEmacs "emacs"
     ++ lib.optional withRuby "ruby";