diff --git a/packages/twenty-front/package.json b/packages/twenty-front/package.json
index 9196a41e7..2e8fedd07 100644
--- a/packages/twenty-front/package.json
+++ b/packages/twenty-front/package.json
@@ -4,8 +4,8 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "build": "VITE_DISABLE_TYPESCRIPT_CHECKER=true VITE_DISABLE_ESLINT_CHECKER=true NODE_OPTIONS=--max-old-space-size=4000 npx vite build && bash ./scripts/inject-runtime-env.sh",
-    "build:sourcemaps": "VITE_BUILD_SOURCEMAP=true VITE_DISABLE_TYPESCRIPT_CHECKER=true VITE_DISABLE_ESLINT_CHECKER=true NODE_OPTIONS=--max-old-space-size=6000 npx vite build && bash ./scripts/inject-runtime-env.sh",
+    "build": "VITE_DISABLE_TYPESCRIPT_CHECKER=true VITE_DISABLE_ESLINT_CHECKER=true NODE_OPTIONS=--max-old-space-size=4000 npx vite build && sh ./scripts/inject-runtime-env.sh",
+    "build:sourcemaps": "VITE_BUILD_SOURCEMAP=true VITE_DISABLE_TYPESCRIPT_CHECKER=true VITE_DISABLE_ESLINT_CHECKER=true NODE_OPTIONS=--max-old-space-size=6000 npx vite build && sh ./scripts/inject-runtime-env.sh",
     "start:prod": "NODE_ENV=production npx vite --host",
     "tsup": "npx tsup"
   },
diff --git a/packages/twenty-front/scripts/inject-runtime-env.sh b/packages/twenty-front/scripts/inject-runtime-env.sh
index 40a04597d..b0f92ae71 100755
--- a/packages/twenty-front/scripts/inject-runtime-env.sh
+++ b/packages/twenty-front/scripts/inject-runtime-env.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 echo "Injecting runtime environment variables into index.html..."
 
@@ -13,7 +13,7 @@ EOF
 )
 # Use sed to replace the config block in index.html
 # Using pattern space to match across multiple lines
-sed -i.bak '
+echo "$CONFIG_BLOCK" | sed -i.bak '
   /<!-- BEGIN: Twenty Config -->/,/<!-- END: Twenty Config -->/{
     /<!-- BEGIN: Twenty Config -->/!{
       /<!-- END: Twenty Config -->/!d
@@ -21,5 +21,5 @@ sed -i.bak '
     /<!-- BEGIN: Twenty Config -->/r /dev/stdin
     /<!-- END: Twenty Config -->/d
   }
-' build/index.html <<< "$CONFIG_BLOCK"
+' build/index.html
 rm -f build/index.html.bak