diff --git a/lib/default.nix b/lib/default.nix
index bf482cf9..a458250e 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -25,7 +25,7 @@
                         Example: `python39`. Default: `python3`
 
   * postgresqlVersion:  PostgreSQL version.
-                        Example: `postgresql_12. `Default: `python3`
+                        Example: `postgresql_12. `Default: `postgresql`
 
   * overridesFile:      file containing packages overrides definitions.
                         Default: false
diff --git a/pkgs/geonixcli/templates/init/flake.nix b/pkgs/geonixcli/templates/init/flake.nix
index 41973ef0..935222a5 100644
--- a/pkgs/geonixcli/templates/init/flake.nix
+++ b/pkgs/geonixcli/templates/init/flake.nix
@@ -20,6 +20,15 @@
 
         pkgs = geonix.lib.getPackages {
           inherit system nixpkgs geonix;
+
+          # Run 'geonix override' command to get overrides.nix template file and
+          # enable following line to start customizing Geonix packages.
+
+          # overridesFile = ./overrides.nix;
+
+          # Python and PostgreSQL versions to use for overrided packages.
+          # pythonVersion = "python3";
+          # postgresqlVersion = "postgresql";
         };
 
         geonixConfig = import ./geonix.nix { inherit pkgs geonix; };
diff --git a/templates/python-web-app/flake.nix b/templates/python-web-app/flake.nix
index 41973ef0..935222a5 100644
--- a/templates/python-web-app/flake.nix
+++ b/templates/python-web-app/flake.nix
@@ -20,6 +20,15 @@
 
         pkgs = geonix.lib.getPackages {
           inherit system nixpkgs geonix;
+
+          # Run 'geonix override' command to get overrides.nix template file and
+          # enable following line to start customizing Geonix packages.
+
+          # overridesFile = ./overrides.nix;
+
+          # Python and PostgreSQL versions to use for overrided packages.
+          # pythonVersion = "python3";
+          # postgresqlVersion = "postgresql";
         };
 
         geonixConfig = import ./geonix.nix { inherit pkgs geonix; };
diff --git a/templates/simple/flake.nix b/templates/simple/flake.nix
index 41973ef0..935222a5 100644
--- a/templates/simple/flake.nix
+++ b/templates/simple/flake.nix
@@ -20,6 +20,15 @@
 
         pkgs = geonix.lib.getPackages {
           inherit system nixpkgs geonix;
+
+          # Run 'geonix override' command to get overrides.nix template file and
+          # enable following line to start customizing Geonix packages.
+
+          # overridesFile = ./overrides.nix;
+
+          # Python and PostgreSQL versions to use for overrided packages.
+          # pythonVersion = "python3";
+          # postgresqlVersion = "postgresql";
         };
 
         geonixConfig = import ./geonix.nix { inherit pkgs geonix; };