diff --git a/pkgs/oizys-nim/default.nix b/pkgs/oizys-nim/default.nix
index 4cc5117..122fbf6 100644
--- a/pkgs/oizys-nim/default.nix
+++ b/pkgs/oizys-nim/default.nix
@@ -8,5 +8,5 @@ buildNimblePackage {
   verions = "unstable";
   src = lib.cleanSource ./.;
   nativeBuildInputs = [ openssl ];
-  nimbleDepsHash = "sha256-3p+PdGkQmKwz5tzJwX0aun3kSOLw/lwzqRkR9+6ECQE=";
+  nimbleDepsHash = "sha256-RceRnhEkei3RfSCTOJsIiw4GSCyhOZhKoEVHNSw/KvA=";
 }
diff --git a/pkgs/oizys-nim/nimble.lock b/pkgs/oizys-nim/nimble.lock
index beeb899..9f7979b 100644
--- a/pkgs/oizys-nim/nimble.lock
+++ b/pkgs/oizys-nim/nimble.lock
@@ -13,12 +13,12 @@
     },
     "hwylterm": {
       "version": "0.1.0",
-      "vcsRevision": "d852761831bd748db24b42f15bc8e2d286232295",
+      "vcsRevision": "7e82f7ba5a24d816a79b3a5ea49f32b4c7a5ef7e",
       "url": "https://github.com/daylinmorgan/hwylterm",
       "downloadMethod": "git",
       "dependencies": [],
       "checksums": {
-        "sha1": "7de2a93a03bd0659d8d70cc7c08315e0a7f15439"
+        "sha1": "d6d97bdff3fcdfcf4b39b144fa5f27a6b9f9494d"
       }
     },
     "jsony": {
diff --git a/pkgs/oizys-nim/src/oizys.nim b/pkgs/oizys-nim/src/oizys.nim
index b983e68..854ae9e 100644
--- a/pkgs/oizys-nim/src/oizys.nim
+++ b/pkgs/oizys-nim/src/oizys.nim
@@ -1,13 +1,8 @@
 ## nix begat oizys
 import std/[os, tables, sequtils, strformat, strutils]
 import hwylterm, hwylterm/[cligen, logging]
-import oizys/[context, github, nix, overlay]# 3, logging
+import oizys/[context, github, nix, overlay, logging]
 
-addHandler(
-  newFancyConsoleLogger(
-    fmtPrefix = $bb"[b magenta]oizys"
-  )
-)
 
 proc confirm(q: string): bool =
   stderr.write $(q & bb"[yellow] (Y/n) ")
@@ -28,7 +23,7 @@ overlay:
     resetCache: bool = false,
     rest: seq[string],
   ) =
-    if not debug: setLogFilter(lvlInfo)
+    setupLoggers(debug)
     updateContext(host, flake, debug, resetCache)
 
   proc dry(minimal: bool = false) =
@@ -82,16 +77,16 @@ proc checkExes() =
   if findExe("nix") == "":
     fatalQuit "oizys requires nix"
 
-func `//`[A, B](pairs: openArray[(A, B)]): Table[A, B] =
-  pairs.toTable()
-func `//`[A, B](t1: var Table[A,B], t2: Table[A,B]) =
-  for k, v in t2.pairs(): t1[k] = v
-func `//`[A, B](t1: Table[A, B], t2: Table[A, B]): Table[A, B] =
-  result // t1; result // t2
-func `//`[A, B](pairs: openArray[(A,B)], t2: Table[A,B]): Table[A,B] =
-  // pairs // t2
-
-
+# func `//`[A, B](pairs: openArray[(A, B)]): Table[A, B] =
+#   pairs.toTable()
+# func `//`[A, B](t1: var Table[A,B], t2: Table[A,B]) =
+#   for k, v in t2.pairs(): t1[k] = v
+# func `//`[A, B](t1: Table[A, B], t2: Table[A, B]): Table[A, B] =
+#   result // t1; result // t2
+# func `//`[A, B](pairs: openArray[(A,B)], t2: Table[A,B]): Table[A,B] =
+#   // pairs // t2
+#
+#
 
 when isMainModule:
   import cligen
@@ -116,16 +111,16 @@ when isMainModule:
     } // sharedHelp
   let
     # clUse must be set here using clCfg doesn't seem to work with dispatchMutli ...
-    clUse* = $bb("$command $args\n${doc}[bold]Options[/]:\n$options")
+    # clUse* = $bb("$command $args\n${doc}[bold]Options[/]:\n$options")
     osUsage = $bb("$command [[subcmd] $args\n$doc[bold]Options[/]:\n$options")
 
   dispatchMulti(
-    [build,  help = sharedHelp, usage = clUse ],
-    [cache,  help = cacheHelp , usage = clUse ],
-    [ci,     help = ciHelp    , usage = clUse ],
-    [dry,    help = sharedHelp, usage = clUse ],
+    [build,  help = sharedHelp, usage = clCfg.use ],
+    [cache,  help = cacheHelp , usage = clCfg.use ],
+    [ci,     help = ciHelp    , usage = clCfg.use ],
+    [dry,    help = sharedHelp, usage = clCfg.use ],
     [osCmd,  help = sharedHelp, usage = osUsage, cmdName = "os"],
-    [output, help = sharedHelp, usage = clUse],
-    [update, help = updateHelp, usage = clUse],
+    [output, help = sharedHelp, usage = clCfg.use],
+    [update, help = updateHelp, usage = clCfg.use],
   )
 
diff --git a/pkgs/oizys-nim/src/oizys/logging.nim b/pkgs/oizys-nim/src/oizys/logging.nim
new file mode 100644
index 0000000..c7685ff
--- /dev/null
+++ b/pkgs/oizys-nim/src/oizys/logging.nim
@@ -0,0 +1,45 @@
+## nix begat oizys
+import std/[logging, os]
+import hwylterm, hwylterm/logging
+export logging
+
+
+proc getDataDir(): string =
+  ## Returns the data directory of the current user for applications.
+  # follows std/os.getCacheDir
+  # which in turn follows https://crates.io/crates/platform-dirs
+  result =
+    when defined(windows):
+      getEnv("LOCALAPPDATA")
+    elif defined(osx):
+      getEnv("XDG_DATA_HOME", getEnv("HOME") / "Library/Application Support")
+    else:
+      getEnv("XDG_DATA_HOME", getEnv("HOME") / ".local/share")
+
+  result.normalizePathEnd(false)
+
+proc getOizysLogPath(): string =
+  let dataDir = getDataDir()
+  createDir(dataDir / "oizys")
+  result = dataDir / "oizys" / "oizys.log"
+
+
+setLogFilter(lvlAll)
+
+proc setupLoggers*(debug: bool) =
+  let logLevel =
+    if not debug: lvlInfo
+    else: lvlAll
+  addHandler(
+    newFancyConsoleLogger(
+      fmtPrefix = $bb"[b magenta]oizys",
+      levelThreshold = logLevel
+    )
+  )
+  addHandler(
+    newRollingFileLogger(
+      getOizysLogPath(),
+      mode = fmAppend,
+      fmtStr = "$datetime | $levelid:"
+    )
+  )