Use a different tmp directory

src/freedombone-app-tahoelafs

     cd /home/tahoelafs/tahoelafs
     git checkout $TAHOELAFS_COMMIT -b $TAHOELAFS_COMMIT
     git submodule update --init --recursive
+    export TMPDIR=/home/tahoelafs/tmp
+    if [ ! $TMPDIR ]; then
+        mkdir $TMPDIR
+    fi
     virtualenv venv --distribute
     venv/bin/pip uninstall --yes setuptools
-    rm -rf /tmp/*
     venv/bin/pip install setuptools==11.3
     venv/bin/pip install six==1.10.0 packaging==16.8 attrs==16.3.0 appdirs==1.4.2 pycrypto==2.1.0 cffi==1.9.1
     venv/bin/pip install cryptography==1.7.2 markerlib==0.6.0 distribute==0.7.3
     su -c "$TAHOE_COMMAND create-introducer -C /home/tahoelafs/data --hide-ip --hostname=127.0.0.1" - tahoelafs
     TAHOELAFS_CONFIG=/home/tahoelafs/data/tahoe.cfg
     if [ ! -f $TAHOELAFS_CONFIG ]; then
+        export TMPDIR=/tmp
         exit 62831
     fi
 
     systemctl start tahoelafs
 
     set_completion_param "tahoelafs commit" "$TAHOELAFS_COMMIT"
-    rm -rf /tmp/*
+    export TMPDIR=/tmp
+    rm -rf /home/tahoelafs/tmp
 
     APP_INSTALLED=1
 }