TEMP: Also pin epicscorelibs

Author: AlexanderWells-diamond

setup.cfg

@@ -60,8 +60,9 @@ dev =
     cothread; sys_platform != "win32"
     p4p>=4.2.0a2
     # Numpy PR #27235 was never backported to 2.0.*, so the latest p4p cannot build against it,
-    # so pin to last good version
+    # so pin to last good version. Also have to pin right epicscorelibs version with it.
     p4p==4.2.1 ; sys_platform == "win32" and python_version == "3.9"
+    epicscorelibs==7.0.7.99.1.2 ; sys_platform == "win32" and python_version == "3.9"
 
 [flake8]
 max-line-length = 80