diff --git a/lib/default.nix b/lib/default.nix
index dbad2e9..38c9eb5 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -90,21 +90,22 @@ let
     );
     formatter = forAllSystems (pkgs: (evalTreeFmt pkgs).config.build.wrapper);
 
-    hydraJobs = {
-      systemPackages =
-        (readDir ../hosts)
-        |> mapAttrs (
-          hostname: _:
-          self.nixosConfigurations."${hostname}".config.environment.systemPackages
-          |> map (drv: {
-            name = drv.name;
-            value = drv;
-          })
-          |> listToAttrs
-        );
-
-      inherit (self) packages;
-    };
+    # use nixosConfigurations.$host.config.oizys.packages instead
+    # hydraJobs = {
+    #   systemPackages =
+    #     (readDir ../hosts)
+    #     |> mapAttrs (
+    #       hostname: _:
+    #       self.nixosConfigurations."${hostname}".config.environment.systemPackages
+    #       |> map (drv: {
+    #         name = drv.name;
+    #         value = drv;
+    #       })
+    #       |> listToAttrs
+    #     );
+    #
+    #   inherit (self) packages;
+    # };
   };
 in
 {
diff --git a/modules/oizys.nix b/modules/oizys.nix
index 1bfd59c..a171666 100644
--- a/modules/oizys.nix
+++ b/modules/oizys.nix
@@ -4,6 +4,7 @@
   self,
   hostName,
   pkgs,
+  config,
   ...
 }:
 let
@@ -13,6 +14,7 @@ let
     loadOverlays
     oizysSettings
     tryPkgsFromFile
+    listToAttrs
     ;
 in
 {
@@ -62,12 +64,25 @@ in
     };
     desktop.enable = mkEnableOption "is desktop";
     docker.enable = mkEnableOption "enable docker support";
+    packages = mkOption {
+      type = lib.types.attrsOf lib.types.package;
+      description = "attr set of all packages, for use with nix-eval-jobs by `oizys cache`";
+    };
   };
+
   config = {
     networking.hostName = hostName;
     time.timeZone = "US/Central";
     nixpkgs.overlays = import ../overlays { inherit inputs loadOverlays; };
-    oizys = oizysSettings hostName;
+    oizys = oizysSettings hostName // {
+      packages =
+        config.environment.systemPackages
+        |> map (drv: {
+          name = drv.name;
+          value = drv;
+        })
+        |> listToAttrs;
+    };
     environment.systemPackages = tryPkgsFromFile { inherit hostName pkgs; };
   };
 }
diff --git a/pkgs/oizys/src/oizys.nim b/pkgs/oizys/src/oizys.nim
index 94818cd..61d4402 100644
--- a/pkgs/oizys/src/oizys.nim
+++ b/pkgs/oizys/src/oizys.nim
@@ -48,6 +48,8 @@ hwylCli:
       j|jobs(countProcessors(),int, "jobs when pushing paths")
       n|`dry-run` "don't actually build derivations"
     run:
+      if findExe("nix-eval-jobs") == "":
+        fatalQuit bb"[b]oizys cache[/] requires [b]nix-eval-jobs[/]"
       nixBuildWithCache(name, args, service, jobs, `dry-run`)
 
     [ci]
diff --git a/pkgs/oizys/src/oizys/nix.nim b/pkgs/oizys/src/oizys/nix.nim
index 25b77a6..455b2eb 100644
--- a/pkgs/oizys/src/oizys/nix.nim
+++ b/pkgs/oizys/src/oizys/nix.nim
@@ -212,8 +212,9 @@ proc missingDrvNixEvalJobs*(): HashSet[NixEvalOutput] =
   var output: string
 
   for host in getHosts():
+    let flakeUrl = getFlake() & "#nixosConfigurations." & host & ".config.oizys.packages"
     let (o, _) = runCmdCaptWithSpinner(
-      fmt"{cmd} {getFlake()}#hydraJobs.systemPackages.{host}",
+      fmt"{cmd} {flakeUrl}",
       bb"running [b]nix-eval-jobs[/] for system path: " & host.bb("bold")
     )
     output.add o