diff --git a/crane.nix b/crane.nix
index cc6c625..d8c5cec 100644
--- a/crane.nix
+++ b/crane.nix
@@ -18,90 +18,98 @@ let
   }).overrideAttrs (old: {
     # Remove the propagated libiconv since we want to add our static version
     depsTargetTargetPropagated = lib.filter (d: d.pname != "libiconv")
-      (lib.flatten (old.depsTargetTargetPropagated or []));
+      (lib.flatten (old.depsTargetTargetPropagated or [ ]));
   });
 
   # For easy cross-compilation in devShells
   # We are just composing the pkgsCross.*.stdenv.cc together
-  crossPlatforms = let
-    makeCrossPlatform = crossSystem: let
-      pkgsCross =
-        if crossSystem == system then pkgs
-        else import pkgs.path {
-          inherit system crossSystem;
-          overlays = [];
+  crossPlatforms =
+    let
+      makeCrossPlatform = crossSystem:
+        let
+          pkgsCross =
+            if crossSystem == system then pkgs
+            else
+              import pkgs.path {
+                inherit system crossSystem;
+                overlays = [ ];
+              };
+
+          rustTargetSpec = rust.toRustTargetSpec pkgsCross.pkgsStatic.stdenv.hostPlatform;
+          rustTargetSpecUnderscored = builtins.replaceStrings [ "-" ] [ "_" ] rustTargetSpec;
+
+          cargoLinkerEnv = lib.strings.toUpper "CARGO_TARGET_${rustTargetSpecUnderscored}_LINKER";
+          cargoCcEnv = "CC_${rustTargetSpecUnderscored}"; # for ring
+
+          ccbin = "${pkgsCross.stdenv.cc}/bin/${pkgsCross.stdenv.cc.targetPrefix}cc";
+        in
+        {
+          name = crossSystem;
+          value = {
+            inherit rustTargetSpec;
+            cc = pkgsCross.stdenv.cc;
+            pkgs = pkgsCross;
+            buildInputs = makeBuildInputs pkgsCross;
+            env = {
+              "${cargoLinkerEnv}" = ccbin;
+              "${cargoCcEnv}" = ccbin;
+            };
+          };
         };
-
-      rustTargetSpec = rust.toRustTargetSpec pkgsCross.pkgsStatic.stdenv.hostPlatform;
-      rustTargetSpecUnderscored = builtins.replaceStrings [ "-" ] [ "_" ] rustTargetSpec;
-
-      cargoLinkerEnv = lib.strings.toUpper "CARGO_TARGET_${rustTargetSpecUnderscored}_LINKER";
-      cargoCcEnv = "CC_${rustTargetSpecUnderscored}"; # for ring
-
-      ccbin = "${pkgsCross.stdenv.cc}/bin/${pkgsCross.stdenv.cc.targetPrefix}cc";
-    in {
-      name = crossSystem;
-      value = {
-        inherit rustTargetSpec;
-        cc = pkgsCross.stdenv.cc;
-        pkgs = pkgsCross;
-        buildInputs = makeBuildInputs pkgsCross;
-        env = {
-          "${cargoLinkerEnv}" = ccbin;
-          "${cargoCcEnv}" = ccbin;
-        };
-      };
-    };
-    systems = lib.filter (s: s == system || lib.hasInfix "linux" s) supportedSystems
-      # Cross from aarch64-darwin -> x86_64-darwin doesn't work yet
-      # Hopefully the situation will improve with the SDK bumps
-      ++ lib.optional (system == "x86_64-darwin") "aarch64-darwin";
-  in builtins.listToAttrs (map makeCrossPlatform systems);
+      systems = lib.filter (s: s == system || lib.hasInfix "linux" s) supportedSystems
+        # Cross from aarch64-darwin -> x86_64-darwin doesn't work yet
+        # Hopefully the situation will improve with the SDK bumps
+        ++ lib.optional (system == "x86_64-darwin") "aarch64-darwin";
+    in
+    builtins.listToAttrs (map makeCrossPlatform systems);
 
   cargoTargets = lib.mapAttrsToList (_: p: p.rustTargetSpec) crossPlatforms;
-  cargoCrossEnvs = lib.foldl (acc: p: acc // p.env) {} (builtins.attrValues crossPlatforms);
+  cargoCrossEnvs = lib.foldl (acc: p: acc // p.env) { } (builtins.attrValues crossPlatforms);
 
-  makeBuildInputs = pkgs: with pkgs; []
+  makeBuildInputs = pkgs: with pkgs; [ ]
     ++ lib.optionals pkgs.stdenv.isDarwin [
-      darwin.apple_sdk.frameworks.Security
-      (libiconv.override { enableStatic = true; enableShared = false; })
-    ];
+    darwin.apple_sdk.frameworks.Security
+    (libiconv.override { enableStatic = true; enableShared = false; })
+  ];
 
-  buildFor = system: let
-    crossPlatform = crossPlatforms.${system};
-    inherit (crossPlatform) pkgs;
-    craneLib = (crane.mkLib pkgs).overrideToolchain rustNightly;
-    crateName = craneLib.crateNameFromCargoToml {
-      cargoToml = ./nix-actions-cache/Cargo.toml;
-    };
-
-    src = nix-gitignore.gitignoreSource [] ./.;
-
-    commonArgs = {
-      inherit (crateName) pname version;
-      inherit src;
-
-      buildInputs = makeBuildInputs pkgs;
-
-      cargoExtraArgs = "--target ${crossPlatform.rustTargetSpec}";
-
-      cargoVendorDir = craneLib.vendorMultipleCargoDeps {
-        inherit (craneLib.findCargoFiles src) cargoConfigs;
-        cargoLockList = [
-          ./Cargo.lock
-          "${rustNightly.passthru.availableComponents.rust-src}/lib/rustlib/src/rust/Cargo.lock"
-        ];
+  buildFor = system:
+    let
+      crossPlatform = crossPlatforms.${system};
+      inherit (crossPlatform) pkgs;
+      craneLib = (crane.mkLib pkgs).overrideToolchain rustNightly;
+      crateName = craneLib.crateNameFromCargoToml {
+        cargoToml = ./nix-actions-cache/Cargo.toml;
       };
-    } // crossPlatform.env;
 
-    crate = craneLib.buildPackage (commonArgs // {
-      cargoArtifacts = craneLib.buildDepsOnly commonArgs;
+      src = nix-gitignore.gitignoreSource [ ] ./.;
 
-      # The resulting executable must be standalone
-      allowedRequisites = [];
-    });
-  in crate;
-in {
+      commonArgs = {
+        inherit (crateName) pname version;
+        inherit src;
+
+        buildInputs = makeBuildInputs pkgs;
+
+        cargoExtraArgs = "--target ${crossPlatform.rustTargetSpec}";
+
+        cargoVendorDir = craneLib.vendorMultipleCargoDeps {
+          inherit (craneLib.findCargoFiles src) cargoConfigs;
+          cargoLockList = [
+            ./Cargo.lock
+            "${rustNightly.passthru.availableComponents.rust-src}/lib/rustlib/src/rust/Cargo.lock"
+          ];
+        };
+      } // crossPlatform.env;
+
+      crate = craneLib.buildPackage (commonArgs // {
+        cargoArtifacts = craneLib.buildDepsOnly commonArgs;
+
+        # The resulting executable must be standalone
+        allowedRequisites = [ ];
+      });
+    in
+    crate;
+in
+{
   inherit crossPlatforms cargoTargets cargoCrossEnvs rustNightly;
 
   nix-actions-cache = buildFor system;
diff --git a/flake.lock b/flake.lock
index 9ce30c3..d28aa5f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -5,20 +5,18 @@
         "flake-compat": [
           "flake-compat"
         ],
-        "flake-utils": [
-          "flake-utils"
-        ],
+        "flake-utils": "flake-utils",
         "nixpkgs": [
           "nixpkgs"
         ],
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1683505101,
-        "narHash": "sha256-VBU64Jfu2V4sUR5+tuQS9erBRAe/QEYUxdVMcJGMZZs=",
+        "lastModified": 1687310026,
+        "narHash": "sha256-20RHFbrnC+hsG4Hyeg/58LvQAK7JWfFItTPFAFamu8E=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "7b5bd9e5acb2bb0cfba2d65f34d8568a894cdb6c",
+        "rev": "116b32c30b5ff28e49f4fcbeeb1bbe3544593204",
         "type": "github"
       },
       "original": {
@@ -47,6 +45,24 @@
       "inputs": {
         "systems": "systems"
       },
+      "locked": {
+        "lastModified": 1685518550,
+        "narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "a1720a10a6cfe8234c0e93907ffe81be440f4cef",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
       "locked": {
         "lastModified": 1681202837,
         "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
@@ -63,11 +79,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1684049129,
-        "narHash": "sha256-7WB9LpnPNAS8oI7hMoHeKLNhRX7k3CI9uWBRSfmOCCE=",
+        "lastModified": 1686960236,
+        "narHash": "sha256-AYCC9rXNLpUWzD9hm+askOfpliLEC9kwAo7ITJc4HIw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "0470f36b02ef01d4f43c641bbf07020bcab71bf1",
+        "rev": "04af42f3b31dba0ef742d254456dc4c14eedac86",
         "type": "github"
       },
       "original": {
@@ -81,7 +97,6 @@
       "inputs": {
         "crane": "crane",
         "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
         "rust-overlay": "rust-overlay_2"
       }
@@ -98,11 +113,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1683080331,
-        "narHash": "sha256-nGDvJ1DAxZIwdn6ww8IFwzoHb2rqBP4wv/65Wt5vflk=",
+        "lastModified": 1685759304,
+        "narHash": "sha256-I3YBH6MS3G5kGzNuc1G0f9uYfTcNY9NYoRc3QsykLk4=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "d59c3fa0cba8336e115b376c2d9e91053aa59e56",
+        "rev": "c535b4f3327910c96dcf21851bbdd074d0760290",
         "type": "github"
       },
       "original": {
@@ -113,19 +128,17 @@
     },
     "rust-overlay_2": {
       "inputs": {
-        "flake-utils": [
-          "flake-utils"
-        ],
+        "flake-utils": "flake-utils_2",
         "nixpkgs": [
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1683512408,
-        "narHash": "sha256-QMJGp/37En+d5YocJuSU89GL14bBYkIJQ6mqhRfqkkc=",
+        "lastModified": 1687400833,
+        "narHash": "sha256-rVENiSupjAE8o1+ZXNRIqewUzM2brm+aeme8MUrwl0U=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "75b07756c3feb22cf230e75fb064c1b4c725b9bc",
+        "rev": "fc0a266e836c079a9131108f4334e5af219dbb93",
         "type": "github"
       },
       "original": {
@@ -148,6 +161,21 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "systems_2": {
+      "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 c6261c8..d766efb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,19 +3,16 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
 
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
       inputs.nixpkgs.follows = "nixpkgs";
-      inputs.flake-utils.follows = "flake-utils";
     };
 
     crane = {
       url = "github:ipetkov/crane";
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.flake-compat.follows = "flake-compat";
-      inputs.flake-utils.follows = "flake-utils";
     };
 
     flake-compat = {
@@ -24,121 +21,124 @@
     };
   };
 
-  outputs = { self, nixpkgs, flake-utils, rust-overlay, crane, ... }: let
-    supportedSystems = flake-utils.lib.defaultSystems;
-  in flake-utils.lib.eachSystem supportedSystems (system: let
-    pkgs = import nixpkgs {
-      inherit system;
-      overlays = [
-        rust-overlay.overlay
+  outputs = { self, nixpkgs, ... }@inputs:
+    let
+      overlays = [ inputs.rust-overlay.overlays.default ];
+      supportedSystems = [
+        "aarch64-linux"
+        "x86_64-linux"
+        "aarch64-darwin"
+        "x86_64-darwin"
       ];
-    };
+      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f rec {
+        pkgs = import nixpkgs { inherit overlays system; };
+        cranePkgs = pkgs.callPackage ./crane.nix {
+          inherit supportedSystems;
+          inherit (inputs) crane;
+        };
+        inherit (pkgs) lib;
+      });
+    in
+    {
+      packages = forEachSupportedSystem ({ pkgs, cranePkgs, ... }: rec {
+        inherit (cranePkgs) nix-actions-cache;
+        default = nix-actions-cache;
+      });
 
-    inherit (pkgs) lib;
+      devShells = forEachSupportedSystem ({ pkgs, cranePkgs, lib }: {
+        default = pkgs.mkShell ({
+          inputsFrom = [ cranePkgs.nix-actions-cache ];
+          packages = with pkgs; [
+            bashInteractive
+            cranePkgs.rustNightly
 
-    cranePkgs = pkgs.callPackage ./crane.nix {
-      inherit crane supportedSystems;
-    };
-  in {
-    packages = rec {
-      inherit (cranePkgs) nix-actions-cache;
-      default = nix-actions-cache;
-    };
-    devShells = {
-      default = pkgs.mkShell ({
-        inputsFrom = [ cranePkgs.nix-actions-cache ];
-        packages = with pkgs; [
-          bashInteractive
-          cranePkgs.rustNightly
+            cargo-bloat
+            cargo-edit
+            cargo-udeps
+            cargo-watch
 
-          cargo-bloat
-          cargo-edit
-          cargo-udeps
+            age
+          ];
+          shellHook =
+            let
+              crossSystems = lib.filter (s: s != pkgs.system) (builtins.attrNames cranePkgs.crossPlatforms);
+            in
+            ''
+              # Returns compiler environment variables for a platform
+              #
+              # getTargetFlags "suffixSalt" "nativeBuildInputs" "buildInputs"
+              getTargetFlags() {
+                # Here we only call the setup-hooks of nativeBuildInputs.
+                #
+                # What's off-limits for us:
+                #
+                # - findInputs
+                # - activatePackage
+                # - Other functions in stdenv setup that depend on the private accumulator variables
+                (
+                  suffixSalt="$1"
+                  nativeBuildInputs="$2"
+                  buildInputs="$3"
 
-          age
-        ];
+                  # Offsets for the nativeBuildInput (e.g., gcc)
+                  hostOffset=-1
+                  targetOffset=0
 
-        # We _can_ cross-compile to multiple systems with one shell :)
-        #
-        # Currently stdenv isn't set up to do that, but we can invoke
-        # the setup mechinary in a sub-shell then compose the results.
-        shellHook = let
-          crossSystems = lib.filter (s: s != pkgs.system) (builtins.attrNames cranePkgs.crossPlatforms);
-        in ''
-          # Returns compiler environment variables for a platform
-          #
-          # getTargetFlags "suffixSalt" "nativeBuildInputs" "buildInputs"
-          getTargetFlags() {
-            # Here we only call the setup-hooks of nativeBuildInputs.
-            #
-            # What's off-limits for us:
-            #
-            # - findInputs
-            # - activatePackage
-            # - Other functions in stdenv setup that depend on the private accumulator variables
-            (
-              suffixSalt="$1"
-              nativeBuildInputs="$2"
-              buildInputs="$3"
+                  # In stdenv, the hooks are first accumulated before being called.
+                  # Here we call them immediately
+                  addEnvHooks() {
+                    local depHostOffset="$1"
+                    # For simplicity, we only call the hook on buildInputs
+                    for pkg in $buildInputs; do
+                      depTargetOffset=1
+                      $2 $pkg
+                    done
+                  }
 
-              # Offsets for the nativeBuildInput (e.g., gcc)
-              hostOffset=-1
-              targetOffset=0
+                  unset _PATH
+                  unset NIX_CFLAGS_COMPILE
+                  unset NIX_LDFLAGS
 
-              # In stdenv, the hooks are first accumulated before being called.
-              # Here we call them immediately
-              addEnvHooks() {
-                local depHostOffset="$1"
-                # For simplicity, we only call the hook on buildInputs
-                for pkg in $buildInputs; do
-                  depTargetOffset=1
-                  $2 $pkg
-                done
+                  # For simplicity, we only call the setup-hooks of nativeBuildInputs
+                  for nbi in $nativeBuildInputs; do
+                    addToSearchPath _PATH "$nbi/bin"
+
+                    if [ -e "$nbi/nix-support/setup-hook" ]; then
+                      source "$nbi/nix-support/setup-hook"
+                    fi
+                  done
+
+                  echo "export NIX_CFLAGS_COMPILE_''${suffixSalt}='$NIX_CFLAGS_COMPILE'"
+                  echo "export NIX_LDFLAGS_''${suffixSalt}='$NIX_LDFLAGS'"
+                  echo "export PATH=$PATH''${_PATH+:$_PATH}"
+                )
               }
 
-              unset _PATH
+              target_flags=$(mktemp)
+              ${lib.concatMapStrings (system: let
+                crossPlatform = cranePkgs.crossPlatforms.${system};
+              in ''
+                getTargetFlags \
+                  "${crossPlatform.cc.suffixSalt}" \
+                  "${crossPlatform.cc} ${crossPlatform.cc.bintools}" \
+                  "${builtins.concatStringsSep " " (crossPlatform.buildInputs ++ crossPlatform.pkgs.stdenv.defaultBuildInputs)}" >$target_flags
+                . $target_flags
+              '') crossSystems}
+              rm $target_flags
+
+              # Suffix flags for current system as well
+              export NIX_CFLAGS_COMPILE_${pkgs.stdenv.cc.suffixSalt}="$NIX_CFLAGS_COMPILE"
+              export NIX_LDFLAGS_${pkgs.stdenv.cc.suffixSalt}="$NIX_LDFLAGS"
               unset NIX_CFLAGS_COMPILE
               unset NIX_LDFLAGS
+            '';
+        } // cranePkgs.cargoCrossEnvs);
 
-              # For simplicity, we only call the setup-hooks of nativeBuildInputs
-              for nbi in $nativeBuildInputs; do
-                addToSearchPath _PATH "$nbi/bin"
-
-                if [ -e "$nbi/nix-support/setup-hook" ]; then
-                  source "$nbi/nix-support/setup-hook"
-                fi
-              done
-
-              echo "export NIX_CFLAGS_COMPILE_''${suffixSalt}='$NIX_CFLAGS_COMPILE'"
-              echo "export NIX_LDFLAGS_''${suffixSalt}='$NIX_LDFLAGS'"
-              echo "export PATH=$PATH''${_PATH+:$_PATH}"
-            )
-          }
-
-          target_flags=$(mktemp)
-          ${lib.concatMapStrings (system: let
-            crossPlatform = cranePkgs.crossPlatforms.${system};
-          in ''
-            getTargetFlags \
-              "${crossPlatform.cc.suffixSalt}" \
-              "${crossPlatform.cc} ${crossPlatform.cc.bintools}" \
-              "${builtins.concatStringsSep " " (crossPlatform.buildInputs ++ crossPlatform.pkgs.stdenv.defaultBuildInputs)}" >$target_flags
-            . $target_flags
-          '') crossSystems}
-          rm $target_flags
-
-          # Suffix flags for current system as well
-          export NIX_CFLAGS_COMPILE_${pkgs.stdenv.cc.suffixSalt}="$NIX_CFLAGS_COMPILE"
-          export NIX_LDFLAGS_${pkgs.stdenv.cc.suffixSalt}="$NIX_LDFLAGS"
-          unset NIX_CFLAGS_COMPILE
-          unset NIX_LDFLAGS
-        '';
-      } // cranePkgs.cargoCrossEnvs);
-      keygen = pkgs.mkShellNoCC {
-        packages = with pkgs; [
-          age
-        ];
-      };
+        keygen = pkgs.mkShellNoCC {
+          packages = with pkgs; [
+            age
+          ];
+        };
+      });
     };
-  });
 }
diff --git a/shell.nix b/shell.nix
index bd803e2..a63c7ee 100644
--- a/shell.nix
+++ b/shell.nix
@@ -13,4 +13,5 @@ let
   shell = flake.shellNix.default // {
     reproduce = flake.defaultNix.outputs.reproduce.${builtins.currentSystem};
   };
-in shell
+in
+shell