From cd986a2a8ee289efebda386b540f580ab1fa1794 Mon Sep 17 00:00:00 2001
From: r-vdp <ramses@well-founded.dev>
Date: Tue, 27 Jan 2026 16:29:28 +0100
Subject: [PATCH 1/2] nixos/tests/transmission: convert to runTest

See https://github.com/NixOS/nixpkgs/issues/386873
---
 nixos/tests/all-tests.nix    |  2 +-
 nixos/tests/transmission.nix | 43 ++++++++++++++++++------------------
 2 files changed, 23 insertions(+), 22 deletions(-)

diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 2b538a450c2f..282835431246 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -1630,7 +1630,7 @@ in
   traefik = runTestOn [ "aarch64-linux" "x86_64-linux" ] ./traefik.nix;
   trafficserver = runTest ./trafficserver.nix;
   transfer-sh = runTest ./transfer-sh.nix;
-  transmission_4 = handleTest ./transmission.nix { };
+  transmission_4 = runTest ./transmission.nix;
   trezord = runTest ./trezord.nix;
   trickster = runTest ./trickster.nix;
   trilium-server = runTestOn [ "x86_64-linux" ] ./trilium-server.nix;
diff --git a/nixos/tests/transmission.nix b/nixos/tests/transmission.nix
index 5186098b40cc..406b0df8599d 100644
--- a/nixos/tests/transmission.nix
+++ b/nixos/tests/transmission.nix
@@ -1,27 +1,28 @@
-import ./make-test-python.nix (
-  { pkgs, ... }:
-  {
-    name = "transmission";
-    meta = with pkgs.lib.maintainers; {
-      maintainers = [ coconnor ];
+{ pkgs, ... }:
+{
+  name = "transmission";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ coconnor ];
+  };
+
+  nodes.machine =
+    { ... }:
+    {
+      imports = [ ../modules/profiles/minimal.nix ];
+
+      networking.firewall.allowedTCPPorts = [ 9091 ];
+
+      security.apparmor.enable = true;
+
+      services.transmission.enable = true;
     };
 
-    nodes.machine =
-      { ... }:
-      {
-        imports = [ ../modules/profiles/minimal.nix ];
-
-        networking.firewall.allowedTCPPorts = [ 9091 ];
-
-        security.apparmor.enable = true;
-
-        services.transmission.enable = true;
-      };
-
-    testScript = ''
+  testScript =
+    { nodes, ... }:
+    #python
+    ''
       start_all()
       machine.wait_for_unit("transmission")
       machine.shutdown()
     '';
-  }
-)
+}

From 314c912811341a90d3f502d87ae3b38954d51486 Mon Sep 17 00:00:00 2001
From: r-vdp <ramses@well-founded.dev>
Date: Tue, 27 Jan 2026 16:30:21 +0100
Subject: [PATCH 2/2] nixos/transmission: replace activationScript by a systemd
 unit

See https://github.com/NixOS/nixpkgs/issues/475305
---
 .../modules/services/torrent/transmission.nix | 36 ++++++++++++-------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/nixos/modules/services/torrent/transmission.nix b/nixos/modules/services/torrent/transmission.nix
index 87493ec6ba62..95d0f9e8a486 100644
--- a/nixos/modules/services/torrent/transmission.nix
+++ b/nixos/modules/services/torrent/transmission.nix
@@ -357,19 +357,29 @@ in
     # when /home/foo is not owned by cfg.user.
     # Note also that using an ExecStartPre= wouldn't work either
     # because BindPaths= needs these directories before.
-    system.activationScripts.transmission-daemon = ''
-      install -d -m 700 -o '${cfg.user}' -g '${cfg.group}' '${cfg.home}/${settingsDir}'
-    ''
-    + optionalString (cfg.downloadDirPermissions != null) ''
-      install -d -m '${cfg.downloadDirPermissions}' -o '${cfg.user}' -g '${cfg.group}' '${cfg.settings.download-dir}'
+    systemd.services.transmission-setup = {
+      before = [ "transmission.service" ];
+      partOf = [ "transmission.service" ];
 
-      ${optionalString cfg.settings.incomplete-dir-enabled ''
-        install -d -m '${cfg.downloadDirPermissions}' -o '${cfg.user}' -g '${cfg.group}' '${cfg.settings.incomplete-dir}'
-      ''}
-      ${optionalString cfg.settings.watch-dir-enabled ''
-        install -d -m '${cfg.downloadDirPermissions}' -o '${cfg.user}' -g '${cfg.group}' '${cfg.settings.watch-dir}'
-      ''}
-    '';
+      serviceConfig = {
+        Type = "oneshot";
+        RemainAfterExit = true;
+      };
+
+      script = ''
+        install -d -m 700 -o '${cfg.user}' -g '${cfg.group}' '${cfg.home}/${settingsDir}'
+      ''
+      + optionalString (cfg.downloadDirPermissions != null) ''
+        install -d -m '${cfg.downloadDirPermissions}' -o '${cfg.user}' -g '${cfg.group}' '${cfg.settings.download-dir}'
+
+        ${optionalString cfg.settings.incomplete-dir-enabled ''
+          install -d -m '${cfg.downloadDirPermissions}' -o '${cfg.user}' -g '${cfg.group}' '${cfg.settings.incomplete-dir}'
+        ''}
+        ${optionalString cfg.settings.watch-dir-enabled ''
+          install -d -m '${cfg.downloadDirPermissions}' -o '${cfg.user}' -g '${cfg.group}' '${cfg.settings.watch-dir}'
+        ''}
+      '';
+    };
 
     systemd.services.transmission = {
       description = "Transmission BitTorrent Service";
@@ -392,7 +402,7 @@ in
               set -eu${lib.optionalString (cfg.settings.message-level >= 3) "x"}
               ${pkgs.jq}/bin/jq --slurp add ${settingsFile} '${cfg.credentialsFile}' |
               install -D -m 600 -o '${cfg.user}' -g '${cfg.group}' /dev/stdin \
-               '${cfg.home}/${settingsDir}/settings.json'
+              '${cfg.home}/${settingsDir}/settings.json'
             ''
           )
         ];