ceph: use python39

Boost 1.75 is not compatible with Python 3.10.

pkgs/tools/filesystems/ceph/default.nix

@@ -2,7 +2,7 @@
 , ensureNewerSourcesHook
 , cmake, pkg-config
 , which, git
-, boost
+, boost175
 , libxml2, zlib, lz4
 , openldap, lttng-ust
 , babeltrace, gperf
@@ -21,7 +21,7 @@
 , doxygen
 , graphviz
 , fmt
-, python3
+, python39
 
 # Optional Dependencies
 , yasm ? null, fcgi ? null, expat ? null
@@ -104,7 +104,13 @@ let
     meta = getMeta "Ceph common module for code shared by manager modules";
   };
 
-  python = python3;
+  # Boost 1.75 is not compatible with Python 3.10
+  python = python39;
+
+  boost = boost175.override {
+    enablePython = true;
+    inherit python;
+  };
 
   ceph-python-env = python.withPackages (ps: [
     ps.sphinx

pkgs/top-level/all-packages.nix

@@ -4601,7 +4601,6 @@ with pkgs;
 
   libceph = ceph.lib;
   inherit (callPackages ../tools/filesystems/ceph {
-    boost = boost175.override { enablePython = true; python = python3; };
     lua = lua5_4;
   })
     ceph