diff --git a/CHANGELOG.md b/CHANGELOG.md
index f9989d4..af100a2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 1.4.0
+
+- Fix: `gm-cli package` now works correctly on Linux.
+- New feature: Configurable package format for Windows (`zip` or `nsis`), macOS (`zip` or `dmg`), and Linux (`zip` or `appimage`) via `gm-options.json` or `--toolchain-options`. Example: `--toolchain-options '{"windows": {"packageType": "nsis"}}'`.
+
 # 1.3.0
 
 - Fix: Create blank games with latest ResourceTool release
diff --git a/package.json b/package.json
index 7fce33c..99fd5f4 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "url": "https://github.com/YoYoGames/gm-cli"
   },
   "type": "module",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "files": [
     "dist",
     "NOTICE"
diff --git a/scripts/e2e.ps1 b/scripts/e2e.ps1
index efb504a..cdeaa54 100644
--- a/scripts/e2e.ps1
+++ b/scripts/e2e.ps1
@@ -30,9 +30,11 @@ function Invoke-Test {
         node "$gmCommand" compile @compileArgs
         if ($LASTEXITCODE -ne 0) { throw "compile (cold) failed" }
 
-        Write-Output "--- compile (warm) ---"
-        node "$gmCommand" compile @compileArgs
-        if ($LASTEXITCODE -ne 0) { throw "compile (warm) failed" }
+        # run again with a warm cache, this time with package
+        # FIXME: the package command seems to be broken on windows! We need to fix this
+        #Write-Output "--- package ---"
+        #node "$gmCommand" package @compileArgs
+        #if ($LASTEXITCODE -ne 0) { throw "package failed" }
 
         Write-Output "--- resourcetool ---"
         node "$gmCommand" resourcetool eval "resource list" --cache-dir "$gmCacheDir"
diff --git a/scripts/e2e.sh b/scripts/e2e.sh
index 182dda3..5515111 100755
--- a/scripts/e2e.sh
+++ b/scripts/e2e.sh
@@ -6,16 +6,19 @@ GM_CACHE_DIR="$(pwd)/.gmcache"
 
 run_test() {
   local template="$1"
-  local target="$2"
+  local target="${2:-}"
   local toolchain="${3:-}"
 
-  echo "=== E2E: template='$template' target='$target' toolchain='${toolchain:-default}' ==="
+  echo "=== E2E: template='$template' target='${target:-default}' toolchain='${toolchain:-default}' ==="
 
   rm -rf test-game
   node "$GM_COMMAND" init --template "$template" --name="test-game" --no-interactive --cache-dir "$GM_CACHE_DIR"
   cd test-game
 
-  local compile_args=(--target "$target" --cache-dir "$GM_CACHE_DIR")
+  local compile_args=(--cache-dir "$GM_CACHE_DIR")
+  if [ -n "$target" ]; then
+    compile_args+=(--target "$target")
+  fi
   if [ -n "$toolchain" ]; then
     compile_args+=(--toolchain "$toolchain")
   fi
@@ -23,8 +26,15 @@ run_test() {
   echo "--- compile (cold) ---"
   node "$GM_COMMAND" compile "${compile_args[@]}"
 
-  echo "--- compile (warm) ---"
-  node "$GM_COMMAND" compile "${compile_args[@]}"
+  # Run again with a warm cache and the package command
+  # unless we are on a mac runner since it looks like  we need a signing key for the game
+  if [ "$(uname)" != "Darwin" ]; then
+    echo "--- package ---"
+    node "$GM_COMMAND" package "${compile_args[@]}"
+  else
+    echo "--- compile ---"
+    node "$GM_COMMAND" compile "${compile_args[@]}"
+  fi
 
   echo "--- resourcetool ---"
   node "$GM_COMMAND" resourcetool eval "resource list" --cache-dir "$GM_CACHE_DIR"
@@ -36,6 +46,7 @@ run_test() {
 export NO_COLOR=1
 
 run_test "Blank Game" operagx
+run_test "Blank Game"
 
 #run_test "Blank Game" operagx gmrt
 
diff --git a/src/gm-options.ts b/src/gm-options.ts
index 435dd5d..f7d2f15 100644
--- a/src/gm-options.ts
+++ b/src/gm-options.ts
@@ -77,6 +77,21 @@ export const gms2Schema = z
           .describe("Path to the Emscripten SDK used when building with YYC"),
       })
       .partial(),
+    windows: z
+      .object({
+        packageType: z.enum(["zip", "nsis"]),
+      })
+      .partial(),
+    mac: z
+      .object({
+        packageType: z.enum(["zip", "dmg"]),
+      })
+      .partial(),
+    linux: z
+      .object({
+        packageType: z.enum(["zip", "appimage"]),
+      })
+      .partial(),
   })
   .partial();
 
diff --git a/src/gms2/options.ts b/src/gms2/options.ts
index b874c20..e46da5b 100644
--- a/src/gms2/options.ts
+++ b/src/gms2/options.ts
@@ -19,6 +19,15 @@ export interface Gms2ToolchainOptions {
     packageType?: "zip" | "wallpaper" | "gamestrip";
     emscriptenSdk?: string;
   };
+  windows: {
+    packageType?: "zip" | "nsis";
+  };
+  mac: {
+    packageType?: "zip" | "dmg";
+  };
+  linux: {
+    packageType?: "zip" | "appimage";
+  };
 }
 
 export function defaultGms2ToolchainOptions(): Gms2ToolchainOptions {
@@ -26,5 +35,14 @@ export function defaultGms2ToolchainOptions(): Gms2ToolchainOptions {
     operagx: {
       packageType: "zip",
     },
+    windows: {
+      packageType: "zip",
+    },
+    mac: {
+      packageType: "zip",
+    },
+    linux: {
+      packageType: "zip",
+    },
   };
 }
diff --git a/src/gms2/use-gms2.ts b/src/gms2/use-gms2.ts
index d2df3ed..087611a 100644
--- a/src/gms2/use-gms2.ts
+++ b/src/gms2/use-gms2.ts
@@ -57,6 +57,9 @@ export async function useGms2(
   const defaults = defaultGms2ToolchainOptions();
   const toolchainOptions: Gms2ToolchainOptions = {
     operagx: options.toolchainOptions.operagx ?? defaults.operagx,
+    windows: options.toolchainOptions.windows ?? defaults.windows,
+    mac: options.toolchainOptions.mac ?? defaults.mac,
+    linux: options.toolchainOptions.linux ?? defaults.linux,
   };
 
   if (runtime === "YYC" && options.target === "windows") {
@@ -106,27 +109,24 @@ export async function useGms2(
     successMessage = "Game exited";
   } else {
     label = `Packaging for ${options.target}`;
-    let targetFile: string;
-    if (command.outputPath === undefined) {
-      const ext = packageExtension(options.target);
-      const projectDir = ctx.path.dirname(options.projectPath);
-      const projectName = getProjectName(ctx, options.projectPath);
-      targetFile = ctx.path.join(projectDir, `${projectName}${ext ?? ""}`);
-    } else {
-      const projectDir = ctx.path.dirname(options.projectPath);
-      targetFile = ctx.path.resolve(projectDir, command.outputPath);
-    }
-    igorAction = getPackageAction(options.target);
-    extraArgs = [
-      "-tf",
+    const projectDir = ctx.path.dirname(options.projectPath);
+    const projectName = getProjectName(ctx, options.projectPath);
+    const resolvedOutputPath =
+      command.outputPath !== undefined
+        ? ctx.path.resolve(projectDir, command.outputPath)
+        : undefined;
+    const {
+      action,
       targetFile,
-      ...(options.target === "operagx"
-        ? [
-            "-packagetype",
-            gxPackageTypeArg(toolchainOptions.operagx.packageType),
-          ]
-        : []),
-    ];
+      extraArgs: packageArgs,
+    } = getPackageAction(
+      options.target,
+      toolchainOptions,
+      resolvedOutputPath,
+      ctx.path.join(projectDir, projectName),
+    );
+    igorAction = action;
+    extraArgs = ["-tf", targetFile, ...packageArgs];
     successMessage = `Package created: ${targetFile}`;
   }
 
@@ -171,44 +171,76 @@ export async function useGms2(
   actionLog.success(successMessage);
 }
 
-function gxPackageTypeArg(
-  packageType: Gms2ToolchainOptions["operagx"]["packageType"],
-): string {
-  switch (packageType) {
-    case undefined:
-    case "zip":
-      return "OperaGXPackage_Zip";
-    case "gamestrip":
-      return "OperaGXPackage_Gamestrip";
-    case "wallpaper":
-      return "OperaGXPackage_Wallpaper";
-    default:
-      packageType satisfies never;
-      throw new Error("Unreachable");
-  }
-}
-
-function getPackageAction(target: Target): string {
+function getPackageAction(
+  target: Target,
+  options: Gms2ToolchainOptions,
+  outputPath: string | undefined,
+  defaultBasePath: string,
+): {
+  action: string;
+  targetFile: string;
+  extraArgs: string[];
+} {
   switch (target) {
-    case "windows":
-    case "mac":
-    case "linux":
-      return "PackageZip";
-    default:
-      return "Package";
-    // FIXME: exhaustiveness checking and fix for platforms like xbox: PackageSubmissionXboxOne", PackageSubmissionXboxSeriesXS
-  }
-}
-
-function packageExtension(target: Target): string | undefined {
-  switch (target) {
-    case "windows":
-    case "linux":
-    case "mac":
-    case "operagx":
-      return ".zip";
+    case "windows": {
+      const nsis = options.windows.packageType === "nsis";
+      return {
+        action: nsis ? "PackageNsis" : "PackageZip",
+        targetFile: outputPath ?? `${defaultBasePath}${nsis ? ".exe" : ".zip"}`,
+        extraArgs: [],
+      };
+    }
+    case "mac": {
+      const dmg = options.mac.packageType === "dmg";
+      return {
+        action: dmg ? "PackageDMG" : "PackageZip",
+        targetFile: outputPath ?? `${defaultBasePath}${dmg ? ".dmg" : ".zip"}`,
+        extraArgs: [],
+      };
+    }
+    case "operagx": {
+      let packageTypeArg: string;
+      switch (options.operagx.packageType) {
+        case undefined:
+        case "zip":
+          packageTypeArg = "OperaGXPackage_Zip";
+          break;
+        case "gamestrip":
+          packageTypeArg = "OperaGXPackage_Gamestrip";
+          break;
+        case "wallpaper":
+          packageTypeArg = "OperaGXPackage_Wallpaper";
+          break;
+        default:
+          options.operagx.packageType satisfies never;
+          throw new Error("Unreachable");
+      }
+      return {
+        action: "Package",
+        targetFile: outputPath ?? `${defaultBasePath}.zip`,
+        extraArgs: ["-packagetype", packageTypeArg],
+      };
+    }
+    case "linux": {
+      const appimage = options.linux.packageType === "appimage";
+      if (
+        appimage &&
+        outputPath !== undefined &&
+        !outputPath.endsWith(".AppImage")
+      ) {
+        throw new KnownError(
+          "When packaging for Linux with AppImage format, the output filename must end in .AppImage.",
+        );
+      }
+      return {
+        action: "Package",
+        targetFile:
+          outputPath ?? `${defaultBasePath}${appimage ? ".AppImage" : ".zip"}`,
+        extraArgs: [],
+      };
+    }
     default:
-      return undefined;
+      throw new KnownError("Target not supported in GM-CLI yet.");
   }
 }