Platformio 6.1.7 doesn't like dots in env names any more.

variants/diy/platformio.ini

@@ -11,7 +11,7 @@ build_flags =
   -I variants/diy/v1
 
 ; Meshtastic DIY v1.1 new schematic based on ESP32-WROOM-32 & SX1262/SX1268 modules
-[env:meshtastic-diy-v1.1]
+[env:meshtastic-diy-v1_1]
 extends = esp32_base
 board = esp32doit-devkit-v1
 board_level = extra

variants/heltec_v2.1/platformio.ini

@@ -1,4 +1,4 @@
-[env:heltec-v2.1]
+[env:heltec-v2_1]
 ;build_type = debug ; to make it possible to step through our jtag debugger 
 extends = esp32_base
 board = heltec_wifi_lora_32_V2

variants/heltec_v2/platformio.ini

@@ -1,4 +1,4 @@
-[env:heltec-v2.0]
+[env:heltec-v2_0]
 ;build_type = debug ; to make it possible to step through our jtag debugger 
 extends = esp32_base
 board = heltec_wifi_lora_32_V2

variants/tbeam_v07/platformio.ini

@@ -1,5 +1,5 @@
 ; The original TBEAM board without the AXP power chip and a few other changes
-[env:tbeam0.7]
+[env:tbeam0_7]
 extends = esp32_base
 board = ttgo-t-beam
 board_level = extra

variants/tlora_v2_1_16/platformio.ini

@@ -1,4 +1,4 @@
-[env:tlora-v2-1-1.6]
+[env:tlora-v2-1-1_6]
 extends = esp32_base
 board = ttgo-lora32-v21
 build_flags = 

variants/tlora_v2_1_18/platformio.ini

@@ -1,4 +1,4 @@
-[env:tlora-v2-1-1.8]
+[env:tlora-v2-1-1_8]
 extends = esp32_base
 board = ttgo-lora32-v21