diff --git a/pkgs/default.nix b/pkgs/default.nix
index 1336019..ca46574 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -9,6 +9,7 @@
   neomutt-export-patches = callPackage ./neomutt-export-patches { };
   note-mark = callPackage ./note-mark { };
   sway-background-image = callPackage ./sway-background-image.nix { };
+  uptime-pretty = callPackage ./uptime-pretty { };
 
   # Pin to older version until
   # https://github.com/nix-community/home-manager/pull/5918
diff --git a/pkgs/uptime-pretty/default.nix b/pkgs/uptime-pretty/default.nix
new file mode 100644
index 0000000..a48c262
--- /dev/null
+++ b/pkgs/uptime-pretty/default.nix
@@ -0,0 +1,7 @@
+{ coreutils, writeShellApplication }:
+
+writeShellApplication {
+  name = "uptime-pretty";
+  runtimeInputs = [ coreutils ];
+  text = builtins.readFile ./uptime-pretty.sh;
+}
diff --git a/pkgs/uptime-pretty/uptime-pretty.sh b/pkgs/uptime-pretty/uptime-pretty.sh
new file mode 100644
index 0000000..4c7c69f
--- /dev/null
+++ b/pkgs/uptime-pretty/uptime-pretty.sh
@@ -0,0 +1,26 @@
+# shellcheck shell=bash
+
+HOUR=$((60 * 60))
+DAY=$((HOUR * 24))
+WEEK=$((DAY * 7))
+
+raw=$(cut -d' ' -f1 </proc/uptime | cut -d. -f1)
+
+printf 'up '
+
+if [[ $raw -gt $WEEK ]]; then
+  printf '%dw ' $((raw / WEEK))
+  raw=$((raw % WEEK))
+fi
+
+if [[ $raw -gt $DAY ]]; then
+  printf '%dd ' $((raw / DAY))
+  raw=$((raw % DAY))
+fi
+
+if [[ $raw -gt $HOUR ]]; then
+  printf '%dh ' $((raw / HOUR))
+  raw=$((raw % HOUR))
+fi
+
+printf %dmin $((raw / 60))
diff --git a/system/home-manager/common.nix b/system/home-manager/common.nix
index c6f2e7c..28c90e3 100644
--- a/system/home-manager/common.nix
+++ b/system/home-manager/common.nix
@@ -1,33 +1,6 @@
 { lib, pkgs, ... }:
 
-let
-  tmuxPrettyUptimeSh = pkgs.writeShellScript "tmux-pretty-uptime" ''
-    HOUR=$((60 * 60))
-    DAY=$((HOUR * 24))
-    WEEK=$((DAY * 7))
-
-    raw=$(cut -d' ' -f1 </proc/uptime | cut -d. -f1)
-
-    printf 'up '
-
-    if [[ $raw -gt $WEEK ]]; then
-      printf '%dw ' $((raw / WEEK))
-      raw=$((raw % WEEK))
-    fi
-
-    if [[ $raw -gt $DAY ]]; then
-      printf '%dd ' $((raw / DAY))
-      raw=$((raw % DAY))
-    fi
-
-    if [[ $raw -gt $HOUR ]]; then
-      printf '%dh ' $((raw / HOUR))
-      raw=$((raw % HOUR))
-    fi
-
-    printf %dmin $((raw / 60))
-  '';
-in {
+{
   home.stateVersion = "23.05";
 
   # `programs.home-manager.enable = true` does not seem to work correctly ..
@@ -132,7 +105,9 @@ in {
           #[fg=orange]#{?client_prefix,^A,  }#[default]"
 
           set-option -g status-right \
-            '#[fg=darkred]#[fg=brightwhite,bg=darkred] #(${tmuxPrettyUptimeSh}) \
+            '#[fg=darkred]#[fg=brightwhite,bg=darkred] #(${
+              lib.getExe pkgs.uptime-pretty
+            }) \
           #[fg=colour59,bg=darkred]#[fg=brightwhite,bg=colour59] %a %I:%M:%S %p #[fg=blue]#[fg=brightwhite,bg=blue] %Y-%m-%d '
         '';
       }