diff --git a/nixos/tiny-dfr.nix b/nixos/tiny-dfr.nix
index 3818df46..0c32c564 100644
--- a/nixos/tiny-dfr.nix
+++ b/nixos/tiny-dfr.nix
@@ -1,7 +1,15 @@
 {
   pkgs,
-  tiny-dfr ? pkgs.tiny-dfr
 }:
+  let tiny-dfr = pkgs.tiny-dfr.overrideAttrs (old: {
+    src = pkgs.fetchFromGitHub {
+      owner = "xeniagda";
+      repo = "tiny-dfr";
+      rev = "master";
+      hash = "sha256-I2R28wQz4Vd8VonbDcM6TZOn5lnWSXqwX4w/sieaQL8=";
+    };
+  });
+in
   assert tiny-dfr.version == "0.3.1";
 {
   services.udev.packages = [ tiny-dfr ];
@@ -37,8 +45,8 @@
     MediaLayerDefault = true;
 
     MediaLayerKeys = [
-      { Icon = "prev-workspace";  Action = "Finance"; } # bind me in the window manager!
-      { Icon = "next-workspace";  Action = "Sport"; }   # bind me in the window manager!
+      { Icon = "prev-workspace";  Action = "Finance";        } # bind me in the window manager!
+      { Icon = "next-workspace";  Action = "Sport";          }   # bind me in the window manager!
       { Icon = "brightness_low";  Action = "BrightnessDown"; }
       { Icon = "brightness_high"; Action = "BrightnessUp";   }
       { Icon = "backlight_low";   Action = "IllumDown";      }
@@ -51,18 +59,25 @@
       { Icon = "volume_up";       Action = "VolumeUp";       }
     ];
     PrimaryLayerKeys = [
-      { Text = "F1";  Action = "F1";       }
-      { Text = "F2";  Action = "F2";       }
-      { Text = "F3";  Action = "F3";       }
-      { Text = "F4";  Action = "F4";       }
-      { Text = "F5";  Action = "F5";       }
-      { Text = "F6";  Action = "F6";       }
-      { Text = "F7";  Action = "F7";       }
-      { Text = "F8";  Action = "F8";       }
-      { Text = "3";  Action = "Num3";       }
-      { Text = "F10"; Action = "F10";      }
-      { Text = "F11"; Action = "F11";      }
-      { Text = "F12"; Action = "F12";      }
+      { Text = "F1";  Action = "F1";  }
+      { Text = "F2";  Action = "F2";  }
+      { Text = "F3";  Action = "F3";  }
+      { Text = "F4";  Action = "F4";  }
+      { Text = "F5";  Action = "F5";  }
+      { Text = "F6";  Action = "F6";  }
+      { Text = "F7";  Action = "F7";  }
+      { Text = "F8";  Action = "F8";  }
+      { Text = "3";  Action = "Num3"; }
+      { Text = "F10"; Action = "F10"; }
+      { Text = "F11"; Action = "F11"; }
+      { Text = "F12"; Action = "F12"; }
     ];
+    ButtonStyle = {
+      InactiveColor = [0.05 0.0 0.1];
+      ActiveColor = [0.3 0.2 0.7];
+      OnTime = 0.05;
+      OffTime = 0.1;
+      Bounce = 5;
+    };
   };
 }