diff --git a/flake.nix b/flake.nix
index e51bf0e..e5a9eb3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -49,12 +49,14 @@
 
   nixConfig = {
     extra-substituters = [
+      "https://attic.dayl.in/oizys"
       "https://hyprland.cachix.org"
       "https://nixpkgs-wayland.cachix.org"
       "https://daylin.cachix.org"
       # "https://cache.lix.systems"
     ];
     extra-trusted-public-keys = [
+      "oizys:DSw3mwVMM/Y+PXSVpkDlU5dLwlORuiJRGPkwr5INSMc="
       "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
       "nixpkgs-wayland.cachix.org-1:3lwxaILxMRkVhehr5StQprHdEo4IrE8sRho9R9HOLYA="
       "daylin.cachix.org-1:fLdSnbhKjtOVea6H9KqXeir+PyhO+sDSPhEW66ClE/k="
diff --git a/hosts/othalan/pkgs.nix b/hosts/othalan/pkgs.nix
index 7645b27..529c505 100644
--- a/hosts/othalan/pkgs.nix
+++ b/hosts/othalan/pkgs.nix
@@ -10,5 +10,6 @@
       graphviz
       typst
       charm-freeze
+      attic-client
     ]);
 }
diff --git a/pkgs/oizys/src/oizys.nim b/pkgs/oizys/src/oizys.nim
index 4d371a4..69f36b2 100644
--- a/pkgs/oizys/src/oizys.nim
+++ b/pkgs/oizys/src/oizys.nim
@@ -1,5 +1,5 @@
 ## nix begat oizys
-import std/[os, tables, sequtils, strformat, strutils]
+import std/[os, osproc, tables, sequtils, strformat, strutils]
 import hwylterm, hwylterm/[cligen, logging]
 import oizys/[context, github, nix, overlay, logging]
 
@@ -53,9 +53,9 @@ overlay:
     ## nix build
     nixBuild(minimal, rest)
 
-  proc cache(minimal: bool = false, name: string = "daylin") =
-    ## build and push to cachix
-    nixBuildWithCache(minimal, name, rest)
+  proc cache(name: string = "oizys", service: string = "attic", jobs: int = countProcessors()) =
+    ## build and push store paths
+    nixBuildWithCache(name, rest, service, jobs)
 
   proc osCmd() =
     ## nixos-rebuild
@@ -97,7 +97,8 @@ when isMainModule:
       "ref"        : "git ref/branch/tag to trigger workflow on"
     }
     cacheHelp = //{
-      "name"       : "name of cachix binary cache"
+      "name"       : "name of cachix binary cache",
+      "jobs"       : "jobs when pushing paths"
     } // sharedHelp
   let
     osUsage = $bb("$command [[subcmd] $args\n$doc[bold]Options[/]:\n$options")
diff --git a/pkgs/oizys/src/oizys/exec.nim b/pkgs/oizys/src/oizys/exec.nim
index ad1da3c..2809582 100644
--- a/pkgs/oizys/src/oizys/exec.nim
+++ b/pkgs/oizys/src/oizys/exec.nim
@@ -9,7 +9,7 @@ import hwylterm
 func addArgs*(cmd: var string, args: openArray[string]) =
   cmd &= " " & args.join(" ")
 
-func addArg*(cmd: var string, arg: string) =
+func addArg*(cmd: var string, arg: string ) =
   cmd &= " " & arg
 
 proc runCmd*(cmd: string): int =
diff --git a/pkgs/oizys/src/oizys/nix.nim b/pkgs/oizys/src/oizys/nix.nim
index 91c174e..5bf7dbe 100644
--- a/pkgs/oizys/src/oizys/nix.nim
+++ b/pkgs/oizys/src/oizys/nix.nim
@@ -193,6 +193,7 @@ proc writeDervationsToStepSummary(drvs: seq[string]) =
   let output = open(summaryFilePath,fmAppend)
   output.writeLine("| derivation | hash |\n|---|---|")
   output.writeLine(rows.join("\n"))
+  close output
 
 proc nixBuild*(minimal: bool, rest: seq[string]) = 
   var cmd = nixCommand("build")
@@ -233,23 +234,42 @@ proc nixBuildHostDry*(minimal: bool, rest: seq[string]) =
   let output = parseDryRunOutput err
   display output
 
-proc nixBuildWithCache*(minimal: bool, name: string, rest:seq[string]) =
-  if findExe("cachix") == "": fatalQuit "is cachix installed?"
-  info bbfmt"building and pushing to cache: [b]{name}"
-  var cmd = "cachix"
-  cmd.addArgs ["watch-exec","--"]
-  cmd.addArg "nix build"
-  if minimal:
-    debug "populating args with derivations not built/cached"
-    let drvs = systemPathDrvsToBuild()
-    if drvs.len == 0:
-      info "nothing to build"
-      quit "exiting...", QuitSuccess
-    cmd.addArgs drvs
-    cmd.addArg "--no-link"
-  else:
-    cmd.addArgs nixosConfigAttrs()
-  cmd.addArgs rest
-  let err = runCmd(cmd)
-  quit err
+
+proc nixBuildWithCache*(name: string, rest:seq[string], service: string, jobs: int) =
+  ## build individual derivations not cached and push to cache
+  if findExe(service) == "": fatalQuit fmt"is {service} installed?"
+  info bbfmt"building and pushing to cache: [b]{name}"
+  debug "determining missing cache hits"
+  let drvs = systemPathDrvsToBuild()
+  if drvs.len == 0:
+    info "nothing to build"
+    quit "exiting...", QuitSuccess
+
+  for drv in drvs:
+    var cmd = "nix build"
+    cmd.addArg drv
+    cmd.addArgs rest
+    let buildErr = runCmd(cmd)
+    if buildErr != 0:
+      error "failed to build: " & drv
+      continue
+
+    let results = collect(
+      for k, p in walkDir(".", relative = true):
+        if k in { pcLinkToDir, pcLinkToFile} and p.startsWith("result"):
+          p
+    )
+
+    cmd = service
+    cmd.addArg "push"
+    cmd.addArg name
+    cmd.addArg "--jobs"
+    cmd.addArg $jobs
+    cmd.addArgs results
+    let pushErr = runCmd(cmd)
+    if pushErr != 0:
+      errorQuit "failed to push build to cache"
+
+    for p in results:
+      removeFile p