diff --git a/flake.lock b/flake.lock
index 91e7d5d..223980b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,20 +1,22 @@
 {
   "nodes": {
-    "flake-utils": {
+    "flake-parts": {
       "inputs": {
-        "systems": "systems"
+        "nixpkgs-lib": [
+          "nixpkgs"
+        ]
       },
       "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "lastModified": 1768135262,
+        "narHash": "sha256-PVvu7OqHBGWN16zSi6tEmPwwHQ4rLPU9Plvs8/1TUBY=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "80daad04eddbbf5a4d883996a73f3f542fa437ac",
         "type": "github"
       },
       "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
         "type": "github"
       }
     },
@@ -36,7 +38,7 @@
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
+        "flake-parts": "flake-parts",
         "nixpkgs": "nixpkgs",
         "rust-overlay": "rust-overlay"
       }
@@ -60,21 +62,6 @@
         "repo": "rust-overlay",
         "type": "github"
       }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 7e35c69..47aa4b8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,80 +1,101 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
-  outputs = {self, nixpkgs, flake-utils, rust-overlay}:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        overlays = [ (import rust-overlay) ];
-        pkgs = import nixpkgs {
-          inherit system overlays;
-        };
+  outputs =
+    inputs@{ flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
 
-        buildEnvVars = {
-          BIN_XDG_PERMISSION_STORE = "${pkgs.xdg-desktop-portal}/libexec/xdg-permission-store";
-          BIN_XDG_DOCUMENT_PORTAL = "${pkgs.xdg-desktop-portal}/libexec/xdg-document-portal";
-          BIN_VIRTIOFSD = "${pkgs.virtiofsd}/bin/virtiofsd";
-        };
+      perSystem =
+        {
+          pkgs,
+          system,
+          ...
+        }:
+        let
+          overlays = [ (import inputs.rust-overlay) ];
+          pkgs' = import inputs.nixpkgs {
+            inherit system overlays;
+          };
 
-        rustToolchain = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
-        rustPlatform = pkgs.makeRustPlatform {
-          cargo = rustToolchain;
-          rustc = rustToolchain;
-        };
-        rustPackage = crate:
-          let cargoToml = builtins.fromTOML (builtins.readFile ./${crate}/Cargo.toml);
-          in rustPlatform.buildRustPackage {
-            inherit (cargoToml.package) name version;
-            src = ./.;
-            cargoLock.lockFile = ./Cargo.lock;
-            cargoLock.outputHashes = {
-              "zbus-5.9.0" = "sha256-uaHPHdmDWYy0jeKPd0/eCUupID2tswGHmEmscp6fCII=";
-              "busd-0.4.0" = "sha256-hIvjt3v6AYc7URLFknXTmSc+NdxOlN/2RGXVsuoNgA4=";
+          buildEnvVars = {
+            BIN_XDG_PERMISSION_STORE = "${pkgs.xdg-desktop-portal}/libexec/xdg-permission-store";
+            BIN_XDG_DOCUMENT_PORTAL = "${pkgs.xdg-desktop-portal}/libexec/xdg-document-portal";
+            BIN_VIRTIOFSD = "${pkgs.virtiofsd}/bin/virtiofsd";
+          };
+
+          rustToolchain = pkgs'.pkgsBuildHost.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
+          rustPlatform = pkgs'.makeRustPlatform {
+            cargo = rustToolchain;
+            rustc = rustToolchain;
+          };
+
+          rustPackage =
+            crate:
+            let
+              cargoToml = builtins.fromTOML (builtins.readFile ./${crate}/Cargo.toml);
+            in
+            rustPlatform.buildRustPackage {
+              inherit (cargoToml.package) name version;
+              src = ./.;
+              cargoLock.lockFile = ./Cargo.lock;
+              cargoLock.outputHashes = {
+                "zbus-5.9.0" = "sha256-uaHPHdmDWYy0jeKPd0/eCUupID2tswGHmEmscp6fCII=";
+                "busd-0.4.0" = "sha256-hIvjt3v6AYc7URLFknXTmSc+NdxOlN/2RGXVsuoNgA4=";
+              };
+              buildAndTestSubdir = crate;
+              env = buildEnvVars;
             };
-            buildAndTestSubdir = crate;
+        in
+        {
+          devShells.default = pkgs'.mkShell {
+            buildInputs = [ rustToolchain ];
             env = buildEnvVars;
           };
-      in
-      {
-        devShells.default = pkgs.mkShell {
-          buildInputs = [ rustToolchain ];
-          env = buildEnvVars;
+
+          packages.sidebus-agent = rustPackage "sidebus-agent";
+          packages.sidebus-broker = rustPackage "sidebus-broker";
         };
 
-        packages.sidebus-agent = rustPackage "sidebus-agent";
-        packages.sidebus-broker = rustPackage "sidebus-broker";
-
-        nixosModules.sidebus-vm = { ... }: {
-          environment.sessionVariables.DBUS_SESSION_BUS_ADDRESS = "unix:path=/run/sidebus.sock";
-          systemd.sockets.sidebus-agent = {
-            # SocketMode= is 0666 by default
-            listenStreams = [ "/run/sidebus.sock" ];
-            wantedBy = [ "sockets.target" ];
-            documentation = [ "https://git.clan.lol/valpackett/sidebus" ];
-          };
-          systemd.services.sidebus-agent = {
-            # TODO: confinement (can do a lot)
-            serviceConfig = {
-              ExecStart = "${rustPackage "sidebus-agent"}/bin/sidebus-agent";
-              ImportCredential = "sidebus.*";
+      flake = {
+        nixosModules.sidebus-vm =
+          { ... }:
+          {
+            environment.sessionVariables.DBUS_SESSION_BUS_ADDRESS = "unix:path=/run/sidebus.sock";
+            systemd.sockets.sidebus-agent = {
+              # SocketMode= is 0666 by default
+              listenStreams = [ "/run/sidebus.sock" ];
+              wantedBy = [ "sockets.target" ];
+              documentation = [ "https://git.clan.lol/valpackett/sidebus" ];
             };
-            documentation = [ "https://git.clan.lol/valpackett/sidebus" ];
+            systemd.services.sidebus-agent = {
+              # TODO: confinement (can do a lot)
+              serviceConfig = {
+                ExecStart = throw "sidebus-vm module requires setting systemd.services.sidebus-agent.serviceConfig.ExecStart to a sidebus-agent package";
+                ImportCredential = "sidebus.*";
+              };
+              documentation = [ "https://git.clan.lol/valpackett/sidebus" ];
+            };
+            systemd.mounts = [
+              {
+                type = "virtiofs";
+                what = "vm-doc-portal";
+                where = "/run/vm-doc-portal";
+                wantedBy = [ "multi-user.target" ];
+              }
+            ];
           };
-          systemd.mounts = [
-            {
-              type = "virtiofs";
-              what = "vm-doc-portal";
-              where = "/run/vm-doc-portal";
-              wantedBy = [ "multi-user.target" ];
-            }
-          ];
-        };
-      }
-    );
+      };
+    };
 }