diff --git a/pkgs/servers/sql/postgresql/ext/pg_bigm.nix b/pkgs/servers/sql/postgresql/ext/pg_bigm.nix
index e5e3ee3087d4..dcd23a0949bb 100644
--- a/pkgs/servers/sql/postgresql/ext/pg_bigm.nix
+++ b/pkgs/servers/sql/postgresql/ext/pg_bigm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, postgresql }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, postgresql }:
 
 stdenv.mkDerivation rec {
   pname = "pg_bigm";
@@ -11,17 +11,22 @@ stdenv.mkDerivation rec {
     hash = "sha256-3lspEglVWzEUTiRIWqW0DpQe8gDn9R/RxsWuI9znYc8=";
   };
 
+  patches = [
+    # Fix compatiblity with PostgreSQL 16. Remove with the next release.
+    (fetchpatch {
+      url = "https://github.com/pgbigm/pg_bigm/commit/2a9d783c52a1d7a2eb414da6f091f6035da76edf.patch";
+      hash = "sha256-LuMpSUPnT8cPChQfA9sJEKP4aGpsbN5crfTKLnDzMN8=";
+    })
+  ];
+
   buildInputs = [ postgresql ];
 
   makeFlags = [ "USE_PGXS=1" ];
 
   installPhase = ''
-    mkdir -p $out/bin    # For buildEnv to setup proper symlinks. See #22653
-    mkdir -p $out/{lib,share/postgresql/extension}
-
-    cp *.so      $out/lib
-    cp *.sql     $out/share/postgresql/extension
-    cp *.control $out/share/postgresql/extension
+    install -D -t $out/lib pg_bigm${postgresql.dlSuffix}
+    install -D -t $out/share/postgresql/extension *.sql
+    install -D -t $out/share/postgresql/extension *.control
   '';
 
   meta = with lib; {