diff --git a/wikidata-query-rdf.nix b/wikidata-query-rdf.nix
index d53651a..c0cfc19 100644
--- a/wikidata-query-rdf.nix
+++ b/wikidata-query-rdf.nix
@@ -12,8 +12,7 @@ let
   buildMavenPackage = subdir: depsHash:
     let
       pomFile = builtins.readFile (src + "/${subdir}/pom.xml");
-      name = builtins.elemAt (builtins.match ".+?<artifactId>([^<]+).*" pomFile) 0;
-      version = builtins.elemAt (builtins.match ".+?<version>([^<]+).*" pomFile) 0;
+      name = subdir;
       
       deps = stdenv.mkDerivation {
         name = "${name}-deps";
@@ -30,8 +29,8 @@ let
         outputHash = depsHash;
       };
     in stdenv.mkDerivation {
-      name = "${name}-${version}";
-      inherit version src buildInputs;
+      name = "${name}";
+      inherit src buildInputs;
 
       buildPhase = ''
         cd ${subdir}