The release tag should be 'calcite-N.N' not 'vN.N'
diff --git a/build.gradle.kts b/build.gradle.kts
index 73b07e1..af8e0ab 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -108,8 +108,8 @@
 releaseParams {
     tlp.set("Calcite")
     componentName.set("Apache Calcite")
-    releaseTag.set("rel/v$buildVersion")
-    rcTag.set(rc.map { "v$buildVersion-rc$it" })
+    releaseTag.set("calcite-$buildVersion")
+    rcTag.set(rc.map { "calcite-$buildVersion-rc$it" })
     sitePreviewEnabled.set(false)
     nexus {
         // https://github.com/marcphilipp/nexus-publish-plugin/issues/35