diff --git a/pkgs/servers/onlyoffice-documentserver/default.nix b/pkgs/servers/onlyoffice-documentserver/default.nix
index 9f8a7ba8c7ed..703eaecf6016 100644
--- a/pkgs/servers/onlyoffice-documentserver/default.nix
+++ b/pkgs/servers/onlyoffice-documentserver/default.nix
@@ -24,9 +24,7 @@ let
 
     preferLocalBuild = true;
 
-    unpackPhase = ''
-      dpkg -x $src .
-    '';
+    unpackCmd = "dpkg -x $curSrc source";
 
     nativeBuildInputs = [
       dpkg