diff --git a/pkgs/desktops/gnome-3/extensions/window-corner-preview/default.nix b/pkgs/desktops/gnome-3/extensions/window-corner-preview/default.nix
new file mode 100644
index 00000000000..b0e45c2b7bf
--- /dev/null
+++ b/pkgs/desktops/gnome-3/extensions/window-corner-preview/default.nix
@@ -0,0 +1,28 @@
+{ stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "gnome-shell-extension-window-corner-preview";
+  version = "unstable-2019-02-27";
+
+  src = fetchFromGitHub {
+    owner = "medenagan";
+    repo = "window-corner-preview";
+    rev = "9c1e97c7f7ecd530abac572050f6ec89c1ac7571";
+    sha256 = "12yx3zfnqkpy9g8mhniw02q61axgb14aqiyj6pdfcdmd6hrgsmz6";
+  };
+
+  dontBuild = true;
+
+  uuid = "window-corner-preview@fabiomereu.it";
+  installPhase = ''
+    mkdir -p $out/share/gnome-shell/extensions
+    cp -r ${uuid} $out/share/gnome-shell/extensions
+  '';
+
+  meta = with stdenv.lib; {
+    description = "GNOME Shell extension showing a video preview on the corner of the screen";
+    license = licenses.mit;
+    maintainers = with maintainers; [ jtojnar ];
+    homepage = https://github.com/medenagan/window-corner-preview;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 696bc52e4de..963af3cc264 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -21332,6 +21332,7 @@ in
     taskwhisperer = callPackage ../desktops/gnome-3/extensions/taskwhisperer { };
     timepp = callPackage ../desktops/gnome-3/extensions/timepp { };
     topicons-plus = callPackage ../desktops/gnome-3/extensions/topicons-plus { };
+    window-corner-preview = callPackage ../desktops/gnome-3/extensions/window-corner-preview { };
   };
 
   hsetroot = callPackage ../tools/X11/hsetroot { };