diff --git a/ext/pgvector.nix b/ext/pgvector.nix
new file mode 100644
index 0000000..fa2f55d
--- /dev/null
+++ b/ext/pgvector.nix
@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitHub, postgresql }:
+
+stdenv.mkDerivation rec {
+  pname = "pgvector";
+  version = "0.5.1";
+
+  buildInputs = [ postgresql ];
+
+  src = fetchFromGitHub {
+    owner  = "pgvector";
+    repo   = pname;
+    rev    = "refs/tags/v${version}";
+    hash   = "sha256-ZNzq+dATZn9LUgeOczsaadr5hwdbt9y/+sAOPIdr77U=";
+  };
+
+  installPhase = ''
+    mkdir -p $out/{lib,share/postgresql/extension}
+
+    cp *.so      $out/lib
+    cp sql/*.sql $out/share/postgresql/extension
+    cp *.control $out/share/postgresql/extension
+  '';
+
+  meta = with lib; {
+    description = "Open-source vector similarity search for Postgres";
+    homepage    = "https://github.com/${src.owner}/${src.repo}";
+    maintainers = with maintainers; [ olirice ];
+    platforms   = postgresql.meta.platforms;
+    license     = licenses.postgresql;
+  };
+}
diff --git a/flake.nix b/flake.nix
index 21ff904..1c49b1c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -73,7 +73,6 @@
           /* pljava */
           "plv8"
           "rum"
-          "pgvector"
           "pg_repack"
           "pgroonga"
         ];
@@ -97,6 +96,7 @@
           ./ext/pg_graphql.nix
           ./ext/pg_stat_monitor.nix
           ./ext/pg_jsonschema.nix
+          ./ext/pgvector.nix
           ./ext/vault.nix
           ./ext/hypopg.nix
           ./ext/pg_tle.nix