diff --git a/default.nix b/default.nix
index bf1f1a9..f0b952f 100644
--- a/default.nix
+++ b/default.nix
@@ -1,8 +1,14 @@
 # TODO
 # - allow injecting a bootstrap file
-# - Set ARCH arg for appimagetool target in default.nix
+{
 
-let
+  buildSystem ? builtins.currentSystem,
+  hostSystem ? builtins.currentSystem,
+
+  revision ? "",
+  releaseName ? "debug",
+
+}: let
 
   pkgsNix = (import ./nix/pkgs.nix);
 
@@ -10,20 +16,14 @@ let
     inherit buildSystem hostSystem;
   };
 
-in {
+  garageNix = (import ./nix/garage.nix);
 
-  buildSystem ? builtins.currentSystem,
-  hostSystem ? builtins.currentSystem,
-
-  selfRev ? "",
-  releaseName ? "debug",
-
-}: rec {
+in rec {
 
   version = pkgs.stdenv.mkDerivation {
     name = "cryptic-net-version";
 
-    inherit selfRev hostSystem releaseName;
+    inherit revision hostSystem releaseName;
     repoSrc = ./.;
 
     nativeBuildInputs = [ pkgs.git ];
@@ -31,22 +31,21 @@ in {
     # TODO it'd be nice to be able to call `go version`, but that doesn't work
     # when crossSystem is being used for some unknown reason.
     goVersion = pkgs.go.version;
-    #garageVersion = garage.version;
-    garageVersion = "TODO";
+    garageVersion = garageNix.version;
 
     builder = builtins.toFile "builder.sh" ''
       source $stdenv/setup
 
       versionFile=version
 
-      if [ "$selfRev" = "" ]; then
+      if [ "$revision" = "" ]; then
         cp -r "$repoSrc" repoSrcCp
-        selfRev="$(cd repoSrcCp && git rev-parse HEAD)"
+        revision="$(cd repoSrcCp && git rev-parse HEAD)"
       fi
 
       echo "Release         $releaseName"   >> "$versionFile"
       echo "System:         $hostSystem"    >> "$versionFile"
-      echo "Git Revision:   $selfRev"       >> "$versionFile"
+      echo "Git Revision:   $revision"      >> "$versionFile"
       echo "Go Version:     $goVersion"     >> "$versionFile"
       echo "Garage Version: $garageVersion" >> "$versionFile"
 
@@ -67,7 +66,7 @@ in {
 
     hostPlatform = pkgs.stdenv.hostPlatform.parsed;
 
-  in pkgs.callPackage (import ./nix/garage.nix) {
+  in pkgs.callPackage garageNix.package {
 
     inherit buildSystem;
     hostSystem = "${hostPlatform.cpu.name}-unknown-${hostPlatform.kernel.name}-musl";
@@ -100,7 +99,7 @@ in {
       appimagetool
     ];
 
-    ARCH = "x86_64";
+    ARCH = pkgs.stdenv.hostPlatform.parsed.cpu.name;
 
     builder = builtins.toFile "build.sh" ''
       source $stdenv/setup
diff --git a/flake.nix b/flake.nix
index 051f27a..0932b0a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,7 +18,7 @@
 
       defaultAttrs = (import ./default.nix) {
         inherit hostSystem buildSystem;
-        selfRev = if self ? rev then self.rev else "dirty";
+        revision = if self ? rev then self.rev else "dirty";
         releaseName = "flake";
       };
 
diff --git a/nix/garage.nix b/nix/garage.nix
index 252a00b..3320829 100644
--- a/nix/garage.nix
+++ b/nix/garage.nix
@@ -1,39 +1,33 @@
-{
-
-  pkgsSrc,
-  buildSystem,
-  hostSystem,
-
-  fetchgit,
-  buildEnv,
-  minio-client,
-
-}: let
+rec {
 
   version = "0.8.1";
 
-  src = fetchgit {
+  src = builtins.fetchGit {
     name = "garage-v${version}";
     url = "https://git.deuxfleurs.fr/Deuxfleurs/garage.git";
     rev = "76230f20282e73a5a5afa33af68152acaf732cf5";
-    sha256 = "sha256-lpNp/jw4YaczG3NM3pVWR0cZ8u/KBQCWvvfAswO4+Do=";
   };
 
-  compiled = (import "${src}/nix/compile.nix") {
+  package = {
+    pkgsSrc,
+    buildSystem,
+    hostSystem,
+  }: let
 
-    system = buildSystem;
-    target = hostSystem;
-    pkgsSrc = pkgsSrc;
+    compile = (import "${src}/nix/compile.nix") {
 
-    cargo2nixOverlay = (import "${src}/nix/common.nix").cargo2nixOverlay;
+      system = buildSystem;
+      target = hostSystem;
+      pkgsSrc = pkgsSrc;
 
-    release = true;
-    git_version = version;
+      cargo2nixOverlay = (import "${src}/nix/common.nix").cargo2nixOverlay;
 
-  };
+      release = true;
+      git_version = version;
+    };
 
-in
-
-  compiled.workspace.garage {
-    compileMode = "build";
-  }
+  in
+    compile.workspace.garage {
+      compileMode = "build";
+    };
+}