diff --git a/pkgs/oizys/nimble.lock b/pkgs/oizys/nimble.lock
index 0d0f2d1..43e4254 100644
--- a/pkgs/oizys/nimble.lock
+++ b/pkgs/oizys/nimble.lock
@@ -21,6 +21,16 @@
         "sha1": "6aeb83e7481ca8686396a568096054bc668294df"
       }
     },
+    "resultz": {
+      "version": "0.1.0",
+      "vcsRevision": "9708a3f10bf3fa54907f52c28ede41cab6838aa6",
+      "url": "https://github.com/daylinmorgan/resultz",
+      "downloadMethod": "git",
+      "dependencies": [],
+      "checksums": {
+        "sha1": "edf54faf880744d61c48900273d2a55ce1d89c36"
+      }
+    },
     "zippy": {
       "version": "0.10.16",
       "vcsRevision": "a99f6a7d8a8e3e0213b3cad0daf0ea974bf58e3f",
diff --git a/pkgs/oizys/oizys.nimble b/pkgs/oizys/oizys.nimble
index 56cf783..f59bfd0 100644
--- a/pkgs/oizys/oizys.nimble
+++ b/pkgs/oizys/oizys.nimble
@@ -14,4 +14,4 @@ requires "nim >= 2.0.8"
 requires "jsony"
 requires "zippy"
 requires "https://github.com/daylinmorgan/hwylterm#6a6bd269"
-
+requires "https://github.com/daylinmorgan/resultz"
diff --git a/pkgs/oizys/oizys/utils.nim b/pkgs/oizys/oizys/utils.nim
new file mode 100644
index 0000000..e69de29
diff --git a/pkgs/oizys/src/oizys/github.nim b/pkgs/oizys/src/oizys/github.nim
index 2cdf5ea..fe96f80 100644
--- a/pkgs/oizys/src/oizys/github.nim
+++ b/pkgs/oizys/src/oizys/github.nim
@@ -2,6 +2,7 @@ import std/[httpclient,logging, os, strformat, strutils, json, tables, tempfiles
 import jsony, hwylterm, hwylterm/logging, zippy/ziparchives
 import ./[exec, context]
 
+
 template withTmpDir(body: untyped): untyped =
   let tmpDir {.inject.} = createTempDir("oizys","")
   body
diff --git a/pkgs/oizys/src/oizys/utils.nim b/pkgs/oizys/src/oizys/utils.nim
index 82a88e9..77caece 100644
--- a/pkgs/oizys/src/oizys/utils.nim
+++ b/pkgs/oizys/src/oizys/utils.nim
@@ -1,8 +1,7 @@
 import std/[strformat, strutils, osproc, sugar, httpclient, terminal, wordwrap]
-import hwylterm
+import hwylterm,resultz
 import ./[nix, exec, logging]
 
-
 # TODO: refactor runCmdCaptWithSpinner so it works in getBuildHash
 proc checkBuild(installable: string): tuple[stdout: string, stderr: string] =
   var
@@ -43,8 +42,7 @@ proc getCaches(): seq[string] =
     echo formatSubprocessError(output)
     fatalQuit "error running `nix config show`"
 
-
-proc hasNarinfo*(cache: string, path: string): tuple[exists:bool, narinfo:string] =
+proc hasNarinfo*(cache: string, path: string): Opt[string] =
   debug fmt"checking {cache} for {path}"
   let
     hash = narHash(path)
@@ -53,22 +51,15 @@ proc hasNarinfo*(cache: string, path: string): tuple[exists:bool, narinfo:string
   var client = newHttpClient()
   try:
     let res = client.get(url)
-    result.exists = res.code == Http200
-    result.narinfo = res.body.strip()
-    # if result and getVerbosity() > 0:
-    #     info "narinfo:\n" & indent(res.body.strip(),2)
+    if res.code == Http200:
+      result.ok res.body.strip()
   finally:
     client.close()
 
 proc prettyDerivation(path: string): BbString =
-  let drv = path.toDerivation()
   const maxLen = 40
-  if drv.name.len < maxLen:
-    result.add drv.name
-  else:
-    result.add drv.name.trunc(maxLen)
-  result.add " "
-  result.add drv.hash.bb("faint")
+  let drv = path.toDerivation()
+  drv.name.trunc(maxLen) & " " & drv.hash.bb("faint")
 
 proc showNarInfo(s: string): BbString =
   let maxWidth = terminalWidth()
@@ -83,6 +74,18 @@ proc showNarInfo(s: string): BbString =
     else:
       result.add v
 
+# TODO: replace this with 'match Some() later for all Opts
+
+proc searchCaches(caches: seq[string], path: string): bool =
+  ## search all caches until a match is found
+  info "searching for: " & prettyDerivation(path)
+  for cache in caches:
+    match hasNarinfo(cache, path):
+      Ok(narinfo):
+        info fmt"exists in {cache}"
+        debug showNarinfo(narinfo)
+      Err(): discard
+
 proc checkForCache*(installables: seq[string], caches: seq[string]) =
   let caches =
     if caches.len > 0: caches
@@ -94,17 +97,5 @@ proc checkForCache*(installables: seq[string], caches: seq[string]) =
       {name: drv.outputs["out"].path}
 
   for name, path in outs:
-    var found = false
-    for cache in caches:
-      let (exists, narinfo) = hasNarinfo(cache, path)
-      if exists:
-        found = true
-        info prettyDerivation(path)
-        info fmt"exists in {cache}"
-        debug showNarinfo(narinfo)
-        break
-
-    if not found:
-      info fmt"failed to find:"
-      info prettyDerivation(path)
-
+    if not searchCaches(caches, path):
+      error "did not find above 'narinfo' in any caches"