diff --git a/pkgs/servers/sql/postgresql/ext/pg_relusage.nix b/pkgs/servers/sql/postgresql/ext/pg_relusage.nix
new file mode 100644
index 000000000000..043adf725033
--- /dev/null
+++ b/pkgs/servers/sql/postgresql/ext/pg_relusage.nix
@@ -0,0 +1,29 @@
+{ lib, stdenv, fetchFromGitHub, postgresql }:
+
+stdenv.mkDerivation rec {
+  pname = "pg_relusage";
+  version = "0.0.1";
+
+  buildInputs = [ postgresql ];
+
+  src = fetchFromGitHub {
+    owner  = "adept";
+    repo   = pname;
+    rev    = "refs/tags/${version}";
+    sha256 = "8hJNjQ9MaBk3J9a73l+yQMwMW/F2N8vr5PO2o+5GvYs=";
+  };
+
+  installPhase = ''
+    install -D -t $out/lib *.so
+    install -D -t $out/share/postgresql/extension *.sql
+    install -D -t $out/share/postgresql/extension *.control
+  '';
+
+  meta = with lib; {
+    description = "pg_relusage extension for PostgreSQL: discover and log the relations used in your statements";
+    homepage    = "https://github.com/adept/pg_relusage";
+    maintainers = with maintainers; [ thenonameguy ];
+    platforms   = postgresql.meta.platforms;
+    license     = licenses.postgresql;
+  };
+}
diff --git a/pkgs/servers/sql/postgresql/packages.nix b/pkgs/servers/sql/postgresql/packages.nix
index 8d0b46ebc3ea..80065bde4ba1 100644
--- a/pkgs/servers/sql/postgresql/packages.nix
+++ b/pkgs/servers/sql/postgresql/packages.nix
@@ -62,6 +62,8 @@ self: super: {
 
     pg_partman = super.callPackage ./ext/pg_partman.nix { };
 
+    pg_relusage = super.callPackage ./ext/pg_relusage.nix { };
+
     pg_safeupdate = super.callPackage ./ext/pg_safeupdate.nix { };
 
     repmgr = super.callPackage ./ext/repmgr.nix { };