[travis] Fix issues

.travis.yml

@@ -13,17 +13,18 @@ install:
   # clone micropython, belyalov's fork of micropython-lib
   - git clone --recurse-submodules https://github.com/micropython/micropython.git
   - git clone https://github.com/belyalov/micropython-lib.git
-  # use micropython release 1.9.4
-  - git checkout v1.9.4
   # make symlinks to required modules
   - export MDST=~/.micropython/lib/
   - mkdir -p $MDST
   - ln -s `pwd`/micropython-lib/unittest/unittest.py $MDST
   - ln -s ../../uasyncio.core/uasyncio/core.py `pwd`/micropython-lib/uasyncio/uasyncio
   - ln -s `pwd`/micropython-lib/uasyncio/uasyncio $MDST/uasyncio
   - ln -s `pwd`/tinyweb $MDST/tinyweb
-  # compile/install micropython
-  - sudo make -C micropython/ports/unix axtls install
+  # compile/install micropython. Use release v1.9.4
+  - cd micropython
+  - git checkout v1.9.4
+  - sudo make -C ports/unix axtls install
+  - cd ..
 
 script:
   # Run style checks