diff --git a/pkgs/by-name/pg/pgcopydb/package.nix b/pkgs/by-name/pg/pgcopydb/package.nix
index f01025740d26..d2c62ea3011a 100644
--- a/pkgs/by-name/pg/pgcopydb/package.nix
+++ b/pkgs/by-name/pg/pgcopydb/package.nix
@@ -12,6 +12,7 @@
   sqlite,
   testers,
   zlib,
+  python3Packages,
 }:
 
 clangStdenv.mkDerivation (finalAttrs: {
@@ -39,6 +40,7 @@ clangStdenv.mkDerivation (finalAttrs: {
       readline
       sqlite
       zlib
+      python3Packages.sphinxHook
     ]
     ++ lib.optionals clangStdenv.hostPlatform.isLinux [
       pam
@@ -46,6 +48,10 @@ clangStdenv.mkDerivation (finalAttrs: {
 
   hardeningDisable = [ "format" ];
 
+  sphinxBuilders = [
+    "man"
+  ];
+
   installPhase = ''
     runHook preInstall