use python -m for pyinstaller

.github/workflows/build.yml

@@ -39,8 +39,8 @@ jobs:
 
           uname -a
           python --version
-          pip --version
-          pip debug
+          python -m pip --version
+          python -m pip debug
 
           # wxPython doen't publish linux wheels in pypi
           wget -q https://extras.wxpython.org/wxPython4/extras/linux/gtk3/ubuntu-16.04/wxPython-4.0.6-cp27-cp27mu-linux_x86_64.whl

bin/build-python

@@ -35,11 +35,11 @@ pyinstaller_args+="-p inkscape/share/extensions "
 pyinstaller_args+="--log-level DEBUG "
 
 if [ "$BUILD" = "windows" ]; then
-    pyinstaller $pyinstaller_args inkstitch.py
+    python -m PyInstaller $pyinstaller_args inkstitch.py
 else
     # without the LD_LIBRARY_PATH, it seems that pyinstaller can't find all of
     # wxpython's shared libraries
-    LD_LIBRARY_PATH="${site_packages}/wx" pyinstaller $pyinstaller_args --strip inkstitch.py;
+    LD_LIBRARY_PATH="${site_packages}/wx" python -m PyInstaller $pyinstaller_args --strip inkstitch.py;
 fi
 
 # pyinstaller put a whole mess of libraries under dist/inkstitch.  We'd like