diff --git a/pkgs/servers/sql/postgresql/ext/postgis.nix b/pkgs/servers/sql/postgresql/ext/postgis.nix
index 170d451b81b0..251d79ffe04a 100644
--- a/pkgs/servers/sql/postgresql/ext/postgis.nix
+++ b/pkgs/servers/sql/postgresql/ext/postgis.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://download.osgeo.org/postgis/source/postgis-${version}.tar.gz";
-    sha256 = "sha256-yMh0wAukqYSocDCva/lUSCFQIGCtRz1clvHU0INcWJI=";
+    hash = "sha256-yMh0wAukqYSocDCva/lUSCFQIGCtRz1clvHU0INcWJI=";
   };
 
   buildInputs = [