diff --git a/nixos/modules/installer/tools/tools.nix b/nixos/modules/installer/tools/tools.nix
index da2e3288936d..38feb4165cf4 100644
--- a/nixos/modules/installer/tools/tools.nix
+++ b/nixos/modules/installer/tools/tools.nix
@@ -84,7 +84,7 @@ let
         # If you prefer a stable release instead, you can change the word unstable to the latest number shown here: https://nixos.org/download
         # i.e. nixos-24.11
         # Use `nix flake update` to update the flake to the latest revision of the chosen release channel.
-        nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+        nixpkgs.url = "https://channels.nixos.org/nixos-unstable/nixexprs.tar.zst";
       };
       outputs = inputs\@{ self, nixpkgs, ... }: {
         # NOTE: '${options.networking.hostName.default}' is the default hostname
diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index 5681165a4e15..61366c3ea75f 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -24,6 +24,8 @@ let
 
   hostPkgs = cfg.host.pkgs;
 
+  useVirtiofs = hostPkgs.stdenv.hostPlatform.isLinux;
+
   consoles = lib.concatMapStringsSep " " (c: "console=${c}") cfg.qemu.consoles;
 
   driveOptions =
@@ -324,23 +326,25 @@ let
         ''
     )}
 
-    echo "Starting virtiofs daemons..."
-    NIX_VIRTIOFS_DIR=$(mktemp -d)
-    ${lib.concatLines (
-      lib.mapAttrsToList (tag: share: ''
-        ${lib.getExe hostPkgs.virtiofsd} \
-          --socket-path="$NIX_VIRTIOFS_DIR"/"${tag}" \
-          --shared-dir="${share.source}" \
-          ${if share.writable then "--writeback" else "--readonly"} \
-          --sandbox=none \
-          --seccomp=none \
-          --cache=always \
-          --no-announce-submounts \
-          --translate-uid=host:65534:0:1 \
-          --translate-gid=host:65534:0:1 \
-          &
-      '') cfg.sharedDirectories
-    )}
+    ${lib.optionalString useVirtiofs ''
+      echo "Starting virtiofs daemons..."
+      NIX_VIRTIOFS_DIR=$(mktemp -d)
+      ${lib.concatLines (
+        lib.mapAttrsToList (tag: share: ''
+          ${lib.getExe hostPkgs.virtiofsd} \
+            --socket-path="$NIX_VIRTIOFS_DIR"/"${tag}" \
+            --shared-dir="${share.source}" \
+            ${if share.writable then "--writeback" else "--readonly"} \
+            --sandbox=none \
+            --seccomp=none \
+            --cache=always \
+            --no-announce-submounts \
+            --translate-uid=host:65534:0:1 \
+            --translate-gid=host:65534:0:1 \
+            &
+        '') cfg.sharedDirectories
+      )}
+    ''}
 
     # Start QEMU.
     exec ${
@@ -437,11 +441,11 @@ in
     (mkRemovedOptionModule [
       "virtualisation"
       "msize"
-    ] "9p was replaced with virtiofs and thus this option is obsolete.")
+    ] "The 9p msize is no longer configurable.")
     (mkRemovedOptionModule [
       "virtualisation"
       "nixStore9pCache"
-    ] "9p was replaced with virtiofs and thus this option is obsolete.")
+    ] "The 9p cache mode for the Nix store is no longer configurable.")
   ];
 
   options = {
@@ -592,8 +596,9 @@ in
       };
       description = ''
         An attributes set of directories that will be shared with the
-        virtual machine using VirtFS (9P filesystem over VirtIO).
-        The attribute name will be used as the 9P mount tag.
+        virtual machine using virtiofs on Linux hosts and VirtFS (9P filesystem
+        over VirtIO) on other hosts. The attribute name will be used as the
+        mount tag.
       '';
     };
 
@@ -1278,10 +1283,20 @@ in
         "-machine memory-backend=mem0"
       ])
       (lib.flatten (
-        lib.mapAttrsToList (tag: share: [
-          "-chardev socket,id=${tag},path=$NIX_VIRTIOFS_DIR/${tag}"
-          "-device vhost-user-fs-pci,chardev=${tag},tag=${tag}"
-        ]) cfg.sharedDirectories
+        lib.mapAttrsToList (
+          tag: share:
+          if useVirtiofs then
+            [
+              "-chardev socket,id=${tag},path=$NIX_VIRTIOFS_DIR/${tag}"
+              "-device vhost-user-fs-pci,chardev=${tag},tag=${tag}"
+            ]
+          else
+            [
+              "-virtfs local,path=${share.source},security_model=none,mount_tag=${tag}${
+                lib.optionalString (!share.writable) ",readonly=on"
+              }"
+            ]
+        ) cfg.sharedDirectories
       ))
       (
         let
@@ -1373,9 +1388,20 @@ in
         name = share.target;
         value = {
           device = tag;
-          fsType = "virtiofs";
+          fsType = if useVirtiofs then "virtiofs" else "9p";
           neededForBoot = true;
-          options = lib.mkIf (!share.writable) [ "ro" ];
+          options =
+            if useVirtiofs then
+              lib.mkIf (!share.writable) [ "ro" ]
+            else
+              [
+                "trans=virtio"
+                "version=9p2000.L"
+                "msize=16384"
+                "x-systemd.requires=modprobe@9pnet_virtio.service"
+              ]
+              ++ lib.optional (tag == "nix-store") "cache=loose"
+              ++ lib.optional (!share.writable) "ro";
         };
       }) cfg.sharedDirectories)
       {
@@ -1488,8 +1514,6 @@ in
         (isEnabled "VIRTIO_PCI")
         (isEnabled "VIRTIO_NET")
         (isEnabled "EXT4_FS")
-        (isEnabled "NET_9P_VIRTIO")
-        (isEnabled "9P_FS")
         (isYes "BLK_DEV")
         (isYes "PCI")
         (isYes "NETDEVICES")
@@ -1497,6 +1521,15 @@ in
         (isYes "INET")
         (isYes "NETWORK_FILESYSTEMS")
       ]
+      ++ (
+        if useVirtiofs then
+          [ (isEnabled "VIRTIO_FS") ]
+        else
+          [
+            (isEnabled "NET_9P_VIRTIO")
+            (isEnabled "9P_FS")
+          ]
+      )
       ++ optionals (!cfg.graphics) [
         (isYes "SERIAL_8250_CONSOLE")
         (isYes "SERIAL_8250")
diff --git a/pkgs/by-name/bc/bcachefs-tools/package.nix b/pkgs/by-name/bc/bcachefs-tools/package.nix
index 65b70865adee..343033d99541 100644
--- a/pkgs/by-name/bc/bcachefs-tools/package.nix
+++ b/pkgs/by-name/bc/bcachefs-tools/package.nix
@@ -32,18 +32,18 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "bcachefs-tools";
-  version = "1.39.5";
+  version = "1.39.6";
 
   src = fetchFromGitHub {
     owner = "koverstreet";
     repo = "bcachefs-tools";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-k9JW6GMXFwphkYGcYMwA59uafNj0EV96wTnbzeuVM1w=";
+    hash = "sha256-cBYn/g6eLT5rTumo4Y24rWSHS2Sc7gFthPuCg1AQ22k=";
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
     inherit (finalAttrs) src;
-    hash = "sha256-hbh4+vpZtVpda2yVZK+fkdPXWd5+GYLbWYPfJsYtPfM=";
+    hash = "sha256-djiIwZie9HjQ/+bCEGniMFkJA66oI0n+9y9Iax4GHOM=";
   };
 
   postPatch = ''
diff --git a/pkgs/by-name/ru/ruff/package.nix b/pkgs/by-name/ru/ruff/package.nix
index fccc7b4f1618..ac4d2d5c74c2 100644
--- a/pkgs/by-name/ru/ruff/package.nix
+++ b/pkgs/by-name/ru/ruff/package.nix
@@ -16,7 +16,7 @@
 
 rustPlatform.buildRustPackage (finalAttrs: {
   pname = "ruff";
-  version = "0.16.6";
+  version = "0.16.7";
 
   __structuredAttrs = true;
 
@@ -24,12 +24,12 @@ rustPlatform.buildRustPackage (finalAttrs: {
     owner = "astral-sh";
     repo = "ruff";
     tag = finalAttrs.version;
-    hash = "sha256-D4/bCgMlaa+hBp9exisCuab6h2aJXxdj014qE1+60JM=";
+    hash = "sha256-djWM6RWAgMpvRnuRyyAAjb7OmfVB+whyB3q35C8z1u8=";
   };
 
   cargoBuildFlags = [ "--package=ruff" ];
 
-  cargoHash = "sha256-GCsUqGuWXfP9WiCzq20Xjl70mXv8a1RtvUg1+IK3TKo=";
+  cargoHash = "sha256-EknMZ4fuWJs0/iB+AkX4ZLMY9E6DAxk+k2tKtTbA1yo=";
 
   nativeBuildInputs = [ installShellFiles ];
 
diff --git a/pkgs/os-specific/linux/kernel/kernels-org.json b/pkgs/os-specific/linux/kernel/kernels-org.json
index 5e27f13231c7..66976d48fd8d 100644
--- a/pkgs/os-specific/linux/kernel/kernels-org.json
+++ b/pkgs/os-specific/linux/kernel/kernels-org.json
@@ -5,38 +5,38 @@
         "lts": false
     },
     "6.1": {
-        "version": "6.1.187",
-        "hash": "sha256:0av4fcw3hv4pfql85s2rirxj7hkdr2kdasj219kwl257xa57jvhv",
+        "version": "6.1.188",
+        "hash": "sha256:0fm3048h1c98gxhpwjprjc2jkrhhwaac1vw91hikbhh72g5hlkgd",
         "lts": true
     },
     "5.15": {
-        "version": "5.15.220",
-        "hash": "sha256:08v7mbwvfgy9vv60j2ssdks4ss218p27rkwwrmjch2hj0ljrkcmm",
+        "version": "5.15.221",
+        "hash": "sha256:130ll4gnj2779kpx8x4r6v28vnwjn4qdw9ksaq3f5vr8wphq4y60",
         "lts": true
     },
     "5.10": {
-        "version": "5.10.269",
-        "hash": "sha256:1sf6iikwr9rikdi097xplz7yw1jj4cx6ldng7gzp8rj0360icnlw",
+        "version": "5.10.270",
+        "hash": "sha256:1rzb9ms2v04gwwka7d8byaxrcfymlikslq36p1p1zsabn0ldawyy",
         "lts": true
     },
     "6.6": {
-        "version": "6.6.156",
-        "hash": "sha256:07a1dyaxmcv289r0n4agna2li2rfsjdld8279cs18jmg9r52dqmf",
+        "version": "6.6.157",
+        "hash": "sha256:0c4c42qzr2vcbqglb9vq5q5vqv4mbqasq1n93j3vf288cg846jmp",
         "lts": true
     },
     "6.12": {
-        "version": "6.12.109",
-        "hash": "sha256:1yp370f2y5czvq24xqply8f6a14gnpjqkfmfyhcm1q9lld9fb12l",
+        "version": "6.12.110",
+        "hash": "sha256:0k2w1lr3h1d814707vfmj826gaz67a9n3msla96zzdlvhghikvlc",
         "lts": true
     },
     "6.18": {
-        "version": "6.18.51",
-        "hash": "sha256:04znimsjfimxxaarzaksn4jvkj1xr5ba7yh1j691ykdzb3w60bxs",
+        "version": "6.18.52",
+        "hash": "sha256:1f11had1amrvhl5f606ikc9ykrlyf0rvln8rkf2hrsjggm7mcs9b",
         "lts": true
     },
     "7.2": {
-        "version": "7.2.5",
-        "hash": "sha256:0y1bcg3pg6zm59bjfrgh1bsy68kxjy9vvxygdzcxmn95hggz1pam",
+        "version": "7.2.6",
+        "hash": "sha256:01pnc344dx239hkfl84hpfdpm7gc08yzrz7llgnlm6dhya2fz6h3",
         "lts": false
     }
 }
diff --git a/pkgs/top-level/release.nix b/pkgs/top-level/release.nix
index d7112f3d536f..a6b22fba574e 100644
--- a/pkgs/top-level/release.nix
+++ b/pkgs/top-level/release.nix
@@ -138,6 +138,7 @@ let
             jobs.stdenv.aarch64-darwin
             jobs.vim.aarch64-darwin
             jobs.cachix.aarch64-darwin
+            jobs.darwin.linux-builder.aarch64-darwin
 
             # UI apps
             # jobs.firefox-unwrapped.aarch64-darwin
@@ -220,6 +221,7 @@ let
         jobs.vim.aarch64-darwin
         jobs.inkscape.aarch64-darwin
         jobs.qt5.qtmultimedia.aarch64-darwin
+        jobs.darwin.linux-builder.aarch64-darwin
         /*
           jobs.tests.cc-wrapper.default.aarch64-darwin
           jobs.tests.cc-wrapper.llvmPackages.clang.aarch64-darwin