Only run the cython steps for cpython; use the right python for develop

appveyor.yml

@@ -114,17 +114,20 @@ install:
   - ps: "if(Test-Path(\"${env:PYTHON}\\Scripts\")) {ls ${env:PYTHON}\\Scripts;}"
 
   # XXX: Most of this is a copy of the Makefile. Remember to update.
-  - "%PYEXE% util/cythonpp.py -o gevent.corecext.c gevent/core.ppyx"
-  - "type gevent\\callbacks.c >> gevent.corecext.c"
-  - "move gevent.corecext.* gevent"
-  - "cython -o gevent.ares.c gevent/ares.pyx"
-  - "move gevent.ares.* gevent"
-  - "move gevent\\_semaphore.pyx gevent\\_semaphore.py"
-  - "cython -o gevent._semaphore.c gevent/_semaphore.py"
-  - "move gevent._semaphore.* gevent"
-  - "del gevent\\_semaphore.py"
-  - "cython -o gevent._util.c gevent/_util.pyx"
-  - "move gevent._util.* gevent"
+  - cmd:
+      IF "%PYTHON_EXE%" == "python" (
+          "%PYEXE% util/cythonpp.py -o gevent.corecext.c gevent/core.ppyx"
+          "type gevent\\callbacks.c >> gevent.corecext.c"
+          "move gevent.corecext.* gevent"
+          "cython -o gevent.ares.c gevent/ares.pyx"
+          "move gevent.ares.* gevent"
+          "move gevent\\_semaphore.pyx gevent\\_semaphore.py"
+          "cython -o gevent._semaphore.c gevent/_semaphore.py"
+          "move gevent._semaphore.* gevent"
+          "del gevent\\_semaphore.py"
+          "cython -o gevent._util.c gevent/_util.pyx"
+          "move gevent._util.* gevent"
+      )
 
 cache:
   - "%TMP%\\py\\"
@@ -133,7 +136,7 @@ build: false  # Not a C# project, build stuff at the test step instead.
 
 test_script:
   # Build the compiled extension and run the project tests
-  - "%CMD_IN_ENV% python setup.py develop"
+  - "%CMD_IN_ENV% %PYEXE% setup.py develop"
   - "cd greentest && %PYEXE% testrunner.py --config ../known_failures.py && cd .."
 
 after_test: