Make package dependencies overridable.

flake.nix

@@ -73,50 +73,71 @@
         };
         # TODO Pin the version for release
         rust = pkgs.rust-bin.stable.latest;
-        llvm = pkgs.llvmPackages_latest;
 
         craneLib = (crane.mkLib pkgs).overrideToolchain rust.default;
 
         # Common derivation arguments used for all builds
-        commonArgs = {
+        commonArgs = { dbus, pkg-config }: {
           src = craneLib.cleanCargoSource ./.;
-          buildInputs = with pkgs; [
+          buildInputs = [
             dbus
           ];
-          nativeBuildInputs = with pkgs; [
-            makeWrapper
+          nativeBuildInputs = [
             pkg-config
           ];
         };
 
         # Build only the cargo dependencies
-        cargoArtifacts = craneLib.buildDepsOnly (commonArgs // {
+        cargoArtifacts = { dbus, pkg-config }:
+          craneLib.buildDepsOnly ((commonArgs { inherit dbus pkg-config; }) // {
             pname = "system-manager";
           });
 
-        system-manager-unwrapped = craneLib.buildPackage (commonArgs // {
+        system-manager-unwrapped =
+          { dbus
+          , pkg-config
+          }:
+          craneLib.buildPackage ((commonArgs { inherit dbus pkg-config; }) // {
             pname = "system-manager";
-          inherit cargoArtifacts;
+            cargoArtifacts = cargoArtifacts { inherit dbus pkg-config; };
           });
 
-        system-manager = pkgs.runCommand "system-manager"
+        system-manager =
+          { dbus
+          , makeBinaryWrapper
+          , nix
+          , pkg-config
+          , runCommand
+          }:
+          let
+            unwrapped = system-manager-unwrapped { inherit dbus pkg-config; };
+          in
+          runCommand "system-manager"
             {
-            nativeBuildInputs = [ pkgs.makeBinaryWrapper ];
+              nativeBuildInputs = [ makeBinaryWrapper ];
             }
             ''
               makeWrapper \
-              ${system-manager-unwrapped}/bin/system-manager \
+                ${unwrapped}/bin/system-manager \
                 $out/bin/system-manager \
-              --prefix PATH : ${nixpkgs.lib.makeBinPath [ pkgs.nix ]}
+                --prefix PATH : ${nixpkgs.lib.makeBinPath [ nix ]}
             '';
 
-        system-manager-clippy = craneLib.cargoClippy (commonArgs // {
-          inherit cargoArtifacts;
+        system-manager-clippy =
+          { dbus
+          , pkg-config
+          }:
+          craneLib.cargoClippy ((commonArgs { inherit dbus pkg-config; }) // {
+            cargoArtifacts = cargoArtifacts { inherit dbus pkg-config; };
             cargoClippyExtraArgs = "--all-targets -- --deny warnings";
           });
 
-        system-manager-test = craneLib.cargoTest (commonArgs // {
-          inherit cargoArtifacts;
+        system-manager-test =
+          { dbus
+          , pkg-config
+          }:
+          craneLib.cargoTest ((commonArgs { inherit dbus pkg-config; }) // {
+            cargoArtifacts = cargoArtifacts { inherit dbus pkg-config; };
           });
 
         # treefmt-nix configuration
@@ -137,15 +158,22 @@
           # cannot be found.
           # The wrapped version has a reference to the nix store path, so nix is
           # part of its runtime closure.
-          inherit system-manager-unwrapped system-manager;
+          system-manager-unwrapped = pkgs.callPackage system-manager-unwrapped { };
+          system-manager = pkgs.callPackage system-manager { };
+
+          system-manager-clippy = pkgs.callPackage system-manager-clippy { };
+          system-manager-test = pkgs.callPackage system-manager-test { };
 
           default = self.packages.${system}.system-manager;
         };
 
-        devShells.default = pkgs.devshell.mkShell {
+        devShells.default =
+          let
+            llvm = pkgs.llvmPackages_latest;
+          in
+          pkgs.devshell.mkShell {
             packages = with pkgs; [
               llvm.clang
-            openssl
               pkg-config
               (rust.default.override {
                 extensions = [ "rust-src" ];
@@ -212,7 +240,7 @@
             enableVmTests = system != flake-utils.lib.system.aarch64-linux;
           in
           {
-            inherit
+            inherit (self.packages.${system})
               # Build the crate as part of `nix flake check` for convenience
               system-manager
               system-manager-clippy