systemd: 251.5 -> 251.7

systemd 251.6 added support for libbpf 1.0.0, so use new libbpf version.

pkgs/os-specific/linux/systemd/default.nix

···
 let
   wantCurl = withRemote || withImportd;
   wantGcrypt = withResolved || withImportd;
-  version = "251.5";
+  version = "251.7";
 
   # Bump this variable on every (major) version change. See below (in the meson options list) for why.
   # command:
···
     owner = "systemd";
     repo = "systemd-stable";
     rev = "v${version}";
-    sha256 = "sha256-2MEmvFT1D+9v8OazBwjnKc7i/x7i196Eoi8bODk1cM4=";
+    sha256 = "sha256-Sa5diyNFyYtREo1xSCcufAW83ZZGZvueoDVuQ2r8wno=";
   };
 
   # On major changes, or when otherwise required, you *must* reformat the patches,
···
           opt = condition: pkg: if condition then pkg else null;
         in
         [
-          # bpf compilation support
-          { name = "libbpf.so.0"; pkg = opt withLibBPF libbpf; }
+          # bpf compilation support. We use libbpf 1 now.
+          { name = "libbpf.so.1"; pkg = opt withLibBPF libbpf; }
+          { name = "libbpf.so.0"; pkg = null; }
 
           # We did never provide support for libxkbcommon & qrencode
           { name = "libxkbcommon.so.0"; pkg = null; }
           { name = "libqrencode.so.4"; pkg = null; }
+          { name = "libqrencode.so.3"; pkg = null; }
 
           # We did not provide libpwquality before so it is safe to disable it for
           # now.

pkgs/top-level/all-packages.nix

···
       enableMinimal = true;
       guiSupport = false;
     };
+    libbpf = libbpf_1;
   };
   systemdMinimal = systemd.override {
     pname = "systemd-minimal";