diff --git a/antlr3.spec b/antlr3.spec
index c45ca35..9b803a0 100644
--- a/antlr3.spec
+++ b/antlr3.spec
@@ -128,7 +128,7 @@ BuildArch:      noarch
 %pom_remove_plugin :antlr3-maven-plugin tool
 %endif
 
-sed -i "s,\${buildNumber},`cat %{_sysconfdir}/fedora-release` `date -u -d@${SOURCE_DATE_EPOCH:-$(date +%%s)}`," tool/src/main/resources/org/antlr/antlr.properties
+sed -i "s,\${buildNumber},`date -u -d@${SOURCE_DATE_EPOCH:-$(date +%%s)}`," tool/src/main/resources/org/antlr/antlr.properties
 %patch0 -p1
 %patch1