I wrote a derivation! I'm very proud of myself.

home/dot_config/sway/config.tmpl

@@ -206,18 +206,18 @@ mode open {
 # s[c]ratchpads commands
 bindsym $mod+c mode scratch
 mode scratch {
-    bindsym Return exec ~/.cargo/bin/sway-scratchpad \
+    bindsym Return exec sway-scratchpad \
                             --command "alacritty" \
                             --mark term \
                             --width 40 \
                             --height 71, $e
-    bindsym b exec ~/.cargo/bin/sway-scratchpad \
+    bindsym b exec sway-scratchpad \
                             --command "blueman-manager" \
                             --mark blue \
                             --width 40 \
                             --height 71, $e
-    bindsym f exec ~/.cargo/bin/sway-scratchpad \
-                            --command "alacritty -e /home/{{ .user }}/.local/bin/tmuxp load /home/{{ .user }}/.config/tmuxp/files.yml" \
+    bindsym f exec sway-scratchpad \
+                            --command "alacritty -e tmuxp load /home/{{ .user }}/.config/tmuxp/files.yml" \
                             --mark files \
                             --width 71 \
                             --height 71, $e

home/dot_config/tmuxp/files.yml

@@ -7,4 +7,4 @@ windows:
       - cd ~/
     panes:
       - shell_command:
-          - ~/.local/bin/nnn  
+          - nnn  

provision/nixos/modules/desktop/sway.nix

@@ -32,6 +32,7 @@ in {
       sway
       swayidle
       swaybg
+      sway-scratchpad
       grim # screenshot functionality
       wl-clipboard # wl-copy and wl-paste for copy/paste from stdin / stdout
       mako # notification system developed by swaywm maintainer

provision/nixos/overlays/default.nix

@@ -0,0 +1,6 @@
+/* This contains various packages we want to overlay. Note that the
+ * other ".nix" files in this directory are automatically loaded.
+ */
+final: prev: {
+  sway-scratchpad = final.callPackage ../pkgs/sway-scratchpad.nix {};
+}

provision/nixos/pkgs/sway-scratchpad.nix

@@ -0,0 +1,22 @@
+{ lib, fetchFromGitHub, rustPlatform }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "sway-scratchpad";
+  version = "0.2.0";
+
+  src = fetchFromGitHub {
+    owner = "matejc";
+    repo = "sway-scratchpad";
+    rev = "2f4d39927a154108f193771a90ae7f298e7ae65f";
+    hash = "sha256-TgiwU95BbKFvISDe8+wn8VQ+8vQNuGsb+7p9kP//5lw=";
+  };
+
+  cargoHash = "sha256-VLWjpb9OmYkBykP51YURWnvgzI1DW0731DbDcJh/7h8=";
+
+  meta = with lib; {
+    description = "Convert a command to a scratchpad, and toggle visibility with sway/i3.";
+    homepage = "https://github.com/matejc/sway-scratchpad";
+    license = licenses.bsd2;
+    maintainers = [ maintainers.starr-dusT ];
+  };
+}