unix: Make sure build dir exists before accessing it for freezing upip.
unix: Make sure build dir exists before accessing it for freezing upip.

dxxb/micropython,ryannathans/micropython,Peetz0r/micropython-esp32,adafruit/micropython,dinau/micropython,selste/micropython,Peetz0r/micropython-esp32,MrSurly/micropython,bvernoux/micropython,infinnovation/micropython,puuu/micropython,mpalomer/micropython,dxxb/micropython,mhoffma/micropython,alex-march/micropython,Timmenem/micropython,micropython/micropython-esp32,emfcamp/micropython,alex-march/micropython,blazewicz/micropython,dinau/micropython,micropython/micropython-esp32,AriZuu/micropython,kerneltask/micropython,adafruit/circuitpython,TDAbboud/micropython,MrSurly/micropython-esp32,Timmenem/micropython,SHA2017-badge/micropython-esp32,micropython/micropython-esp32,drrk/micropython,blazewicz/micropython,torwag/micropython,pfalcon/micropython,ganshun666/micropython,Peetz0r/micropython-esp32,toolmacher/micropython,adafruit/micropython,PappaPeppar/micropython,henriknelson/micropython,emfcamp/micropython,hosaka/micropython,henriknelson/micropython,oopy/micropython,ganshun666/micropython,lowRISC/micropython,henriknelson/micropython,tuc-osg/micropython,oopy/micropython,TDAbboud/micropython,oopy/micropython,HenrikSolver/micropython,jmarcelino/pycom-micropython,pfalcon/micropython,chrisdearman/micropython,ryannathans/micropython,tuc-osg/micropython,pramasoul/micropython,micropython/micropython-esp32,mhoffma/micropython,lowRISC/micropython,dmazzella/micropython,jmarcelino/pycom-micropython,kerneltask/micropython,bvernoux/micropython,pozetroninc/micropython,toolmacher/micropython,trezor/micropython,dinau/micropython,deshipu/micropython,pfalcon/micropython,bvernoux/micropython,MrSurly/micropython,hosaka/micropython,praemdonck/micropython,dmazzella/micropython,adafruit/circuitpython,adafruit/circuitpython,MrSurly/micropython-esp32,selste/micropython,AriZuu/micropython,praemdonck/micropython,torwag/micropython,MrSurly/micropython-esp32,mpalomer/micropython,trezor/micropython,ganshun666/micropython,toolmacher/micropython,kerneltask/micropython,chrisdearman/micropython,chrisdearman/micropython,pramasoul/micropython,pfalcon/micropython,cwyark/micropython,tobbad/micropython,tobbad/micropython,swegener/micropython,infinnovation/micropython,redbear/micropython,alex-robbins/micropython,tralamazza/micropython,deshipu/micropython,MrSurly/micropython,turbinenreiter/micropython,SHA2017-badge/micropython-esp32,chrisdearman/micropython,kerneltask/micropython,tobbad/micropython,henriknelson/micropython,blazewicz/micropython,infinnovation/micropython,turbinenreiter/micropython,redbear/micropython,matthewelse/micropython,oopy/micropython,deshipu/micropython,emfcamp/micropython,TDAbboud/micropython,HenrikSolver/micropython,tobbad/micropython,mpalomer/micropython,emfcamp/micropython,blazewicz/micropython,hiway/micropython,TDAbboud/micropython,SHA2017-badge/micropython-esp32,SHA2017-badge/micropython-esp32,MrSurly/micropython-esp32,pozetroninc/micropython,henriknelson/micropython,TDAbboud/micropython,MrSurly/micropython,matthewelse/micropython,drrk/micropython,deshipu/micropython,cwyark/micropython,dxxb/micropython,alex-robbins/micropython,jmarcelino/pycom-micropython,selste/micropython,torwag/micropython,selste/micropython,dxxb/micropython,pozetroninc/micropython,turbinenreiter/micropython,blazewicz/micropython,adafruit/circuitpython,alex-march/micropython,chrisdearman/micropython,puuu/micropython,lowRISC/micropython,AriZuu/micropython,torwag/micropython,ryannathans/micropython,selste/micropython,Timmenem/micropython,swegener/micropython,dmazzella/micropython,hosaka/micropython,ryannathans/micropython,puuu/micropython,hiway/micropython,drrk/micropython,cwyark/micropython,tobbad/micropython,PappaPeppar/micropython,mpalomer/micropython,pozetroninc/micropython,SHA2017-badge/micropython-esp32,bvernoux/micropython,turbinenreiter/micropython,cwyark/micropython,hiway/micropython,ryannathans/micropython,MrSurly/micropython,dinau/micropython,misterdanb/micropython,PappaPeppar/micropython,redbear/micropython,jmarcelino/pycom-micropython,micropython/micropython-esp32,misterdanb/micropython,puuu/micropython,jmarcelino/pycom-micropython,hosaka/micropython,kerneltask/micropython,swegener/micropython,adafruit/micropython,lowRISC/micropython,HenrikSolver/micropython,pramasoul/micropython,bvernoux/micropython,alex-robbins/micropython,PappaPeppar/micropython,ganshun666/micropython,mhoffma/micropython,ganshun666/micropython,tralamazza/micropython,hiway/micropython,tuc-osg/micropython,hosaka/micropython,alex-robbins/micropython,misterdanb/micropython,toolmacher/micropython,adafruit/circuitpython,redbear/micropython,dinau/micropython,trezor/micropython,Timmenem/micropython,torwag/micropython,drrk/micropython,alex-march/micropython,misterdanb/micropython,Timmenem/micropython,matthewelse/micropython,alex-march/micropython,puuu/micropython,matthewelse/micropython,tuc-osg/micropython,mhoffma/micropython,cwyark/micropython,tralamazza/micropython,mhoffma/micropython,redbear/micropython,Peetz0r/micropython-esp32,adafruit/micropython,mpalomer/micropython,PappaPeppar/micropython,trezor/micropython,matthewelse/micropython,HenrikSolver/micropython,misterdanb/micropython,adafruit/circuitpython,toolmacher/micropython,tralamazza/micropython,adafruit/micropython,AriZuu/micropython,drrk/micropython,deshipu/micropython,turbinenreiter/micropython,hiway/micropython,HenrikSolver/micropython,pramasoul/micropython,infinnovation/micropython,swegener/micropython,alex-robbins/micropython,praemdonck/micropython,praemdonck/micropython,AriZuu/micropython,trezor/micropython,oopy/micropython,swegener/micropython,pozetroninc/micropython,lowRISC/micropython,emfcamp/micropython,MrSurly/micropython-esp32,praemdonck/micropython,pramasoul/micropython,dxxb/micropython,tuc-osg/micropython,infinnovation/micropython,matthewelse/micropython,dmazzella/micropython,pfalcon/micropython,Peetz0r/micropython-esp32