diff --git a/flake.nix b/flake.nix
index f674095..30a6236 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,7 +26,13 @@
       }
       {
 			  flake = {
-					lib = {
+					lib = rec {
+					  filterByHolochainPackageType = holochainPackageType: packages: inputs.nixpkgs.lib.filterAttrs (key: value: value.meta.holochainPackageType == holochainPackageType) packages; 
+
+						filterZomes = filterByHolochainPackageType "zome";
+						filterDnas = filterByHolochainPackageType "dna";
+						filterHapps = filterByHolochainPackageType "happ";
+
 						rustZome = { cratePath, holochain, workspacePath, optimizeWasm ? true, excludedCrates ? [] }: 
 							let 
 							  system = holochain.devShells.holonix.system;
diff --git a/nix/dna.nix b/nix/dna.nix
index 4ddc4dd..f27178d 100644
--- a/nix/dna.nix
+++ b/nix/dna.nix
@@ -45,4 +45,7 @@ in
 			hc dna pack workdir
 			mv workdir/${manifest.name}.dna $out
  		'';
+		meta = {
+			holochainPackageType = "dna";
+		};
 	}
diff --git a/nix/happ.nix b/nix/happ.nix
index 218e009..c758203 100644
--- a/nix/happ.nix
+++ b/nix/happ.nix
@@ -42,4 +42,7 @@ in
 			hc app pack workdir
 			mv workdir/${manifest.name}.happ $out
  		'';
+		meta = {
+			holochainPackageType = "happ";
+		};
 	}
diff --git a/nix/zome.nix b/nix/zome.nix
index 8cadcd1..65229c1 100644
--- a/nix/zome.nix
+++ b/nix/zome.nix
@@ -50,6 +50,6 @@ in
 		  cp ${wasm}/lib/${crate}.wasm $out 
  		'';
 		meta = {
-			holochainType = "zome";
+			holochainPackageType = "zome";
 		};
 	}