diff --git a/ts/bundle_svelte.mjs b/ts/bundle_svelte.mjs
index 26d6fcda9..03d948335 100644
--- a/ts/bundle_svelte.mjs
+++ b/ts/bundle_svelte.mjs
@@ -6,7 +6,7 @@ import { sassPlugin } from "esbuild-sass-plugin";
 import sveltePlugin from "esbuild-svelte";
 import { readFileSync, writeFileSync } from "fs";
 import { basename } from "path";
-import { argv } from "process";
+import { argv, env } from "process";
 import sveltePreprocess from "svelte-preprocess";
 import { typescript } from "svelte-preprocess-esbuild";
 
@@ -26,7 +26,7 @@ build({
     entryPoints: [entrypoint],
     globalName: "anki",
     outfile: bundle_js,
-    minify: true,
+    minify: env.RELEASE && true,
     loader: { ".svg": "text" },
     preserveSymlinks: true,
     sourcemap: false,
diff --git a/ts/bundle_ts.mjs b/ts/bundle_ts.mjs
index 1ce642d3b..d2b300e4c 100644
--- a/ts/bundle_ts.mjs
+++ b/ts/bundle_ts.mjs
@@ -2,7 +2,7 @@
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import { build } from "esbuild";
-import { argv } from "process";
+import { argv, env } from "process";
 
 const [_node, _script, entrypoint, bundle_js] = argv;
 
@@ -13,7 +13,7 @@ build({
     bundle: true,
     entryPoints: [entrypoint],
     outfile: bundle_js,
-    minify: true,
+    minify: env.RELEASE && true,
     preserveSymlinks: true,
     target,
 }).catch(() => process.exit(1));