diff --git a/jflex.spec b/jflex.spec
index dd5118c..444614c 100644
--- a/jflex.spec
+++ b/jflex.spec
@@ -4,7 +4,7 @@
 Summary:        Fast Scanner Generator
 Name:           jflex
 Version:        1.6.1
-Release:        7%{?dist}
+Release:        8%{?dist}
 License:        BSD
 URL:            http://jflex.de/
 BuildArch:      noarch
@@ -61,7 +61,7 @@ This package provides %{summary}.
 %pom_xpath_inject "pom:plugin[pom:artifactId='maven-surefire-plugin']/pom:configuration" "<argLine>-Xss16384k</argLine>"
 
 %build
-java -jar %{_javadir}/java_cup.jar -parser LexParse -interface -destdir src/main/java src/main/cup/LexParse.cup
+java -jar $(find-jar java_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
 
@@ -113,6 +113,9 @@ install -p -m 644 lib/jflex-mode.elc %{buildroot}%{_emacs_sitelispdir}/%{name}
 
 
 %changelog
+* Fri Jun  2 2017 Mikolaj Izdebski <mizdebsk@redhat.com> - 1.6.1-8
+- Don't hardcode java_cup JAR path
+
 * Wed May 31 2017 Michael Simacek <msimacek@redhat.com> - 1.6.1-7
 - Replace absolute path with a macro