ledger: fix Python 3.10 module build

The current default boost (1.77) doesn’t work with Python 3.10, so use
1.79 instead.

pkgs/applications/office/ledger/default.nix

@@ -50,7 +50,6 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
     homepage = "https://ledger-cli.org/";
     description = "A double-entry accounting system with a command-line reporting interface";
     license = licenses.bsd3;

pkgs/top-level/python-packages.nix

@@ -4769,6 +4769,7 @@ in {
 
   ledger = (toPythonModule (pkgs.ledger.override {
     usePython = true;
+    boost = pkgs.boost179; # Current default boost (1.77) doesn’t work with Python 3.10.
     python3 = python;
   })).py;