opening output file C:\Users\VAIBHA~1\AppData\Local\Temp\arduino_build_529793\preproc\ctags_target_for_gcc_minus_e.cpp: Permission denied

```
Arduino: 1.8.9 (Windows 10), Board: "Arduino/Genuino Uno"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Vaibhav Dixit\Documents\Arduino\libraries -fqbn=arduino:avr:uno -ide-version=10809 -build-path C:\Users\VAIBHA~1\AppData\Local\Temp\arduino_build_529793 -warnings=all -build-cache C:\Users\VAIBHA~1\AppData\Local\Temp\arduino_cache_158768 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.2.1.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino14.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Program Files (x86)\Arduino\examples\01.Basics\Blink\Blink.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Vaibhav Dixit\Documents\Arduino\libraries -fqbn=arduino:avr:uno -ide-version=10809 -build-path C:\Users\VAIBHA~1\AppData\Local\Temp\arduino_build_529793 -warnings=all -build-cache C:\Users\VAIBHA~1\AppData\Local\Temp\arduino_cache_158768 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.2.1.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino14.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Program Files (x86)\Arduino\examples\01.Basics\Blink\Blink.ino
Using board 'uno' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Detecting libraries used...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10809 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "C:\\Users\\VAIBHA~1\\AppData\\Local\\Temp\\arduino_build_529793\\sketch\\Blink.ino.cpp" -o nul
Generating function prototypes...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10809 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "C:\\Users\\VAIBHA~1\\AppData\\Local\\Temp\\arduino_build_529793\\sketch\\Blink.ino.cpp" -o "C:\\Users\\VAIBHA~1\\AppData\\Local\\Temp\\arduino_build_529793\\preproc\\ctags_target_for_gcc_minus_e.cpp"
cc1plus.exe: fatal error: opening output file C:\Users\VAIBHA~1\AppData\Local\Temp\arduino_build_529793\preproc\ctags_target_for_gcc_minus_e.cpp: Permission denied

compilation terminated.

exit status 1
Error compiling for board Arduino/Genuino Uno.
```

Start by reproducing the Arduino/Genuino Uno Blink build on Windows 10 with arduino-builder and inspect how the build path and preproc directory are handled. The reported failure is opening C:\Users\VAIBHA~1\AppData\Local\Temp\arduino_build_529793\preproc\ctags_target_for_gcc_minus_e.cpp; done means the build completes without the permission-denied error.

Written by the indexing model from the issue text.