diff --git a/home/kagami-pc-home.nix b/home/kagami-pc-home.nix
index bc40a84..0c67533 100644
--- a/home/kagami-pc-home.nix
+++ b/home/kagami-pc-home.nix
@@ -5,7 +5,7 @@
     # Common configuration
     ./common.nix
     # osu!
-    ./osu.nix
+    ./osu
   ];
 
   # Home Manager needs a bit of information about you and the
diff --git a/home/macbook-nixos.nix b/home/macbook-nixos.nix
index ddd03e0..8178d4e 100644
--- a/home/macbook-nixos.nix
+++ b/home/macbook-nixos.nix
@@ -10,7 +10,8 @@ in
     # We use our own firefox
     # ./firefox.nix
     # osu!
-    # ./osu.nix
+    # ./osu
+
   ];
 
   # Home Manager needs a bit of information about you and the
diff --git a/home/nki-framework.nix b/home/nki-framework.nix
index 5fab12e..472945f 100644
--- a/home/nki-framework.nix
+++ b/home/nki-framework.nix
@@ -7,7 +7,7 @@
     # We use our own firefox
     # ./firefox.nix
     # osu!
-    ./osu.nix
+    ./osu
   ];
 
   # Home Manager needs a bit of information about you and the
diff --git a/home/nki-x1c1.nix b/home/nki-x1c1.nix
index 9f762bd..9fdeb5e 100644
--- a/home/nki-x1c1.nix
+++ b/home/nki-x1c1.nix
@@ -22,7 +22,7 @@ in
     # We use our own firefox
     # ./firefox.nix
     # osu!
-    ./osu.nix
+    ./osu
   ];
 
   # Home Manager needs a bit of information about you and the
diff --git a/home/osu.nix b/home/osu/default.nix
similarity index 92%
rename from home/osu.nix
rename to home/osu/default.nix
index 0937ac5..adb9a68 100644
--- a/home/osu.nix
+++ b/home/osu/default.nix
@@ -18,6 +18,7 @@ let
         ''
           mv -v $out/bin/${pname} $out/bin/osu\!
           install -m 444 -D ${contents}/osu\!.desktop -t $out/share/applications
+          install -m 444 -D ${./mimetypes.xml} $out/share/mime/packages/${pname}.xml
           for i in 16 32 48 64 96 128 256 512 1024; do
             install -D ${contents}/osu.png $out/share/icons/hicolor/''${i}x$i/apps/osu.png
           done
diff --git a/home/osu/mimetypes.xml b/home/osu/mimetypes.xml
new file mode 100644
index 0000000..fa7ec94
--- /dev/null
+++ b/home/osu/mimetypes.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<mime-info xmlns='http://www.freedesktop.org/standards/shared-mime-info'>
+  <mime-type type="application/x-osu-beatmap-archive">
+    <icon name="osu"/>
+    <comment xml:lang="en">osu! Beatmap Archive</comment>
+    <glob pattern="*.osz"/>
+    <glob pattern="*.olz"/>
+  </mime-type>
+  <mime-type type="application/x-osu-skin-archive">
+    <icon name="osu"/>
+    <comment xml:lang="en">osu! Skin Archive</comment>
+    <glob pattern="*.osk"/>
+  </mime-type>
+  <mime-type type="application/x-osu-beatmap">
+    <icon name="osu"/>
+    <comment xml:lang="en">osu! Beatmap</comment>
+    <glob pattern="*.osu"/>
+  </mime-type>
+  <mime-type type="application/x-osu-storyboard">
+    <icon name="osu"/>
+    <comment xml:lang="en">osu! Storyboard</comment>
+    <glob pattern="*.osb"/>
+  </mime-type>
+  <mime-type type="application/x-osu-replay">
+    <icon name="osu"/>
+    <comment xml:lang="en">osu! Replay</comment>
+    <glob pattern="*.osr"/>
+  </mime-type>
+</mime-info>