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-rw-r--r--nixos/modules/services/databases/postgresql.nix13
-rw-r--r--nixos/tests/postgresql-jit.nix6
2 files changed, 13 insertions, 6 deletions
diff --git a/nixos/modules/services/databases/postgresql.nix b/nixos/modules/services/databases/postgresql.nix
index 16f76248b3a0d..3d55995aba055 100644
--- a/nixos/modules/services/databases/postgresql.nix
+++ b/nixos/modules/services/databases/postgresql.nix
@@ -7,9 +7,18 @@ let
   cfg = config.services.postgresql;
 
   postgresql =
+    let
+      # ensure that
+      #   services.postgresql = {
+      #     enableJIT = true;
+      #     package = pkgs.postgresql_<major>;
+      #   };
+      # works.
+      base = if cfg.enableJIT && !cfg.package.jitSupport then cfg.package.withJIT else cfg.package;
+    in
     if cfg.extraPlugins == []
-      then cfg.package
-      else cfg.package.withPackages (_: cfg.extraPlugins);
+      then base
+      else base.withPackages (_: cfg.extraPlugins);
 
   toStr = value:
     if true == value then "yes"
diff --git a/nixos/tests/postgresql-jit.nix b/nixos/tests/postgresql-jit.nix
index 21682aad96da9..baf26b8da2b39 100644
--- a/nixos/tests/postgresql-jit.nix
+++ b/nixos/tests/postgresql-jit.nix
@@ -7,9 +7,7 @@ with import ../lib/testing-python.nix { inherit system pkgs; };
 
 let
   inherit (pkgs) lib;
-  packages = lib.filter
-    (lib.hasSuffix "_jit")
-    (builtins.attrNames (import ../../pkgs/servers/sql/postgresql pkgs));
+  packages = builtins.attrNames (import ../../pkgs/servers/sql/postgresql pkgs);
 
   mkJitTest = packageName: makeTest {
     name = "${packageName}";
@@ -17,8 +15,8 @@ let
     nodes.machine = { pkgs, lib, ... }: {
       services.postgresql = {
         enable = true;
+        enableJIT = true;
         package = pkgs.${packageName};
-        settings.jit = "on";
         initialScript = pkgs.writeText "init.sql" ''
           create table demo (id int);
           insert into demo (id) select generate_series(1, 5);