--- xmvn-4.2.0/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/DefaultArtifactInstaller.java	2023-07-24 10:18:52.523347251 +0200
+++ xmvn-4.2.0/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/DefaultArtifactInstaller.java	2023-07-24 11:24:03.362142115 +0200
@@ -185,7 +185,7 @@
         am.setNamespace( repo.getNamespace() );
 
         // UUID
-        am.setUuid( UUID.randomUUID().toString() );
+        am.setUuid( UUID.nameUUIDFromBytes((System.getenv("SOURCE_DATE_EPOCH")+repo.getNamespace()+artifact.toString()).getBytes()).toString() );
 
         // Compat version
         for ( String version : rule.getVersions() )
--- xmvn-4.2.0/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/JavaPackage.java	2023-07-24 10:18:52.523347251 +0200
+++ xmvn-4.2.0/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/JavaPackage.java	2023-07-24 11:56:47.481600604 +0200
@@ -58,7 +58,7 @@
         super( id );
         this.basePackageName = basePackageName;
         this.metadataDir = metadataDir;
-        metadata.setUuid( UUID.randomUUID().toString() );
+        metadata.setUuid( UUID.nameUUIDFromBytes((System.getenv("SOURCE_DATE_EPOCH")+basePackageName).getBytes()).toString() );
     }
 
     /**
@@ -71,7 +71,7 @@
     private PackageMetadata getSplitMetadata( String namespace )
     {
         PackageMetadata splitMetadata = new PackageMetadata();
-        splitMetadata.setUuid( UUID.randomUUID().toString() );
+        splitMetadata.setUuid( UUID.nameUUIDFromBytes((System.getenv("SOURCE_DATE_EPOCH")+namespace).getBytes()).toString() );
         splitMetadata.setProperties( metadata.getProperties() );
         List<ArtifactMetadata> allArtifacts = metadata.getArtifacts();
         List<ArtifactMetadata> splitArtifacts =