diff --git a/users/simon/modules/mpv.nix b/users/simon/modules/mpv.nix
index 6256ed5..f5407d8 100644
--- a/users/simon/modules/mpv.nix
+++ b/users/simon/modules/mpv.nix
@@ -1,26 +1,34 @@
-{ config, pkgs, ... }:
+{ config, lib, pkgs, ... }:
 let
   mpv-prescalers = pkgs.fetchFromGitHub {
     owner = "bjin";
     repo = "mpv-prescalers";
     rev = "b37d0f12223720f5ce48e149678162ae0a984176";
     sha256 = "1mmf5827qsyph0wqkyvi7zfng1cskkapngn5hf9073zc61n4398y";
+
+    meta.license = lib.licenses.lgpl3Plus;
   };
 
   shaders = {
     fsrcnnx_x2 = pkgs.fetchurl {
       url = "https://github.com/igv/FSRCNN-TensorFlow/releases/download/1.1/FSRCNNX_x2_16-0-4-1.glsl";
       sha256 = "1ik99yb424r6qzq4j9pp244yx6c6sq6khqrhv9n6qv4ndi1h2qmq";
+
+      meta.license = lib.licenses.mit;
     };
 
     SSimDownscaler = pkgs.fetchurl {
       url = "https://gist.github.com/igv/36508af3ffc84410fe39761d6969be10/raw/ac09db2c0664150863e85d5a4f9f0106b6443a12/SSimDownscaler.glsl";
       sha256 = "1c3fp6llg0n8zdxadsg6g3kcvhqvikalbc9q61zgwvsx8q3d8rph";
+
+      meta.license = lib.licenses.lgpl3Plus;
     };
 
     KrigBilateral = pkgs.fetchurl {
       url = "https://gist.github.com/igv/a015fc885d5c22e6891820ad89555637/raw/c471ef6dcbd3c4a977e1c95dc40944ee38fad08a/KrigBilateral.glsl";
       sha256 = "11s0h6i0y3h2nrfp6lax6hzwvjbn93akjr6d61jrmz09zdf1iwmc";
+
+      meta.license = lib.licenses.lgpl3Plus;
     };
   };
 
@@ -39,6 +47,8 @@ let
       mkdir -p $out/share/mpv/scripts/
       cp pitchcontrol.lua $out/share/mpv/scripts
     '';
+
+    meta.license = lib.licenses.isc;
   });
 
   gallery-view = pkgs.fetchFromGitHub {
@@ -46,6 +56,8 @@ let
     repo = "mpv-gallery-view";
     rev = "5139d346de67e8dbee8c8983777026502d6bc627";
     sha256 = "1xcl31rpb6kp479kil4srkclw9ly565zavr65ary9s8795ygfcrs";
+
+    meta.license = lib.licenses.gpl2;
   };
 
   cycleShaders = shaders: "cycle-values glsl-shaders ${builtins.concatStringsSep " " shaders}";