diff --git a/platformio.ini b/platformio.ini
index d45e58953b..c271c8092a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -89,7 +89,7 @@ build_flags =
     ${common:arduino.build_flags}
     -DUSE_ESP8266
     -DUSE_ESP8266_FRAMEWORK_ARDUINO
-extra_scripts = post:esphome/components/esp8266/post_build.py
+extra_scripts = post:esphome/components/esp8266/post_build.py.script
 
 ; This are common settings for the ESP32 (all variants) using Arduino.
 [common:esp32-arduino]
@@ -108,7 +108,7 @@ build_flags =
     ${common:arduino.build_flags}
     -DUSE_ESP32
     -DUSE_ESP32_FRAMEWORK_ARDUINO
-extra_scripts = post:esphome/components/esp32/post_build.py
+extra_scripts = post:esphome/components/esp32/post_build.py.script
 
 ; This are common settings for the ESP32 (all variants) using IDF.
 [common:esp32-idf]
@@ -127,7 +127,7 @@ build_flags =
     -Wno-nonnull-compare
     -DUSE_ESP32
     -DUSE_ESP32_FRAMEWORK_ESP_IDF
-extra_scripts = post:esphome/components/esp32/post_build.py
+extra_scripts = post:esphome/components/esp32/post_build.py.script
 
 ; All the actual environments are defined below.
 [env:esp8266-arduino]