Index: Externals/Eagle/lib/Eagle1.0/vendor.eagle
==================================================================
--- Externals/Eagle/lib/Eagle1.0/vendor.eagle
+++ Externals/Eagle/lib/Eagle1.0/vendor.eagle
@@ -443,10 +443,17 @@
     #       be superfluous to third-party test suites (i.e. those that are
     #       not testing the Eagle core library itself).
     #
     set no(core) 1
 
+    #
+    # HACK: Prevent the Eagle core test suite infrastructure from checking
+    #       for a usable instance of Excel because it can be quite slow to
+    #       do so.
+    #
+    set no(excelUsable) 1
+
     #
     # NOTE: Make the per-test connection flag output a little less noisy.
     #
     set no(emitLocalFlagsIfNone) 1
     set no(emitSharedFlagsIfNone) 1