diff --git a/jflex.spec b/jflex.spec
index 61da111..08a57ee 100644
--- a/jflex.spec
+++ b/jflex.spec
@@ -68,7 +68,7 @@ This package provides %{summary}.
 sed -i /%%inputstreamctor/d src/main/jflex/LexScan.flex
 
 %build
-java -jar $(find-jar java_cup) -parser LexParse -interface -destdir src/main/java src/main/cup/LexParse.cup
+cup -parser LexParse -interface -destdir src/main/java src/main/cup/LexParse.cup
 jflex -d src/main/java/jflex --skel src/main/jflex/skeleton.nested src/main/jflex/LexScan.flex
 %mvn_build