diff --git a/configs/packages/haskell/default.nix b/configs/packages/haskell/default.nix
index f019725..47dadd2 100644
--- a/configs/packages/haskell/default.nix
+++ b/configs/packages/haskell/default.nix
@@ -10,14 +10,14 @@
       :set -Wall
     '';
       # :def unpl \x -> return $ ":!${pkgs.haskellPackages.pointful}/bin/pointful \"" ++ x ++ "\""
-    ".stack/config.yaml".text = let user = config.niveum.user; in ''
-      templates:
-        params:
-          author-name: ${user.name}
-          author-email: ${user.email}
-          copyright: 'Copyright: (c) 2019 ${user.name}'
-          github-username: ${user.github}
-    '';
+    ".stack/config.yaml".text = let user = config.niveum.user; in builtins.toJSON {
+        templates.params = {
+          author-name = user.name;
+          author-email = user.email;
+          copyright = "Copyright: (c) 2019 ${user.name}";
+          github-username = user.github;
+        };
+      };
   };
 
   services.hoogle = {
diff --git a/systems/catullus/configuration.nix b/systems/catullus/configuration.nix
index e238bb0..a8c770b 100644
--- a/systems/catullus/configuration.nix
+++ b/systems/catullus/configuration.nix
@@ -7,65 +7,79 @@ let
     wilde = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDyTnGhFq0Q+vghNhrqNrAyY+CsN7nNz8bPfiwIwNpjk kfm@wilde";
   };
   unstable = import <nixos-unstable> {};
-  wtf-config = pkgs.writeText "config.yml" ''
-    wtf:
-      colors:
-        background: black
-        border:
-          focusable: darkslateblue
-          focused: orange
-          normal: gray
-      grid:
-        columns: [40, 54]
-        rows: [10, 20]
-      refreshInterval: 1
-      mods:
-        clocks:
-          colors:
-            rows:
-              even: "lightblue"
-              odd: "white"
-          enabled: true
-          locations:
-            Berlin: Europe/Berlin
-            London: Europe/London
-            Moscow: Europe/Moscow
-            New York: America/New York
-          position:
-            top: 0
-            left: 0
-            height: 1
-            width: 1
-          refreshInterval: 15
-          sort: "alphabetical"
-        security:
-          enabled: true
-          position:
-            top: 1
-            left: 0
-            height: 1
-            width: 1
-          refreshInterval: 300
-        prettyweather:
-          enabled: true
-          city: Berlin
-          position:
-            top: 0
-            left: 1
-            height: 1
-            width: 1
-          refreshInterval: 3600
-        cmdrunner:
-          enabled: true
-          args: ["status"]
-          cmd: traadfri
-          position:
-            top: 1
-            left: 1
-            height: 1
-            width: 1
-          refreshInterval: 2
-  '';
+  wtf-config = pkgs.writeText "config.yml" (builtins.toJSON {
+    wtf = {
+      colors = {
+        background = "black";
+        border = {
+          focusable = "darkslateblue";
+          focused = "orange";
+          normal = "gray";
+        };
+      };
+      grid = {
+        columns = [40 54];
+        rows = [10 20];
+      };
+      refreshInterval = 1;
+      mods = {
+        clocks = {
+          colors.rows = {
+            even = "lightblue";
+            odd = "white";
+          };
+          enabled = true;
+          locations = {
+            "Berlin" = "Europe/Berlin";
+            "London" = "Europe/London";
+            "Moscow" = "Europe/Moscow";
+            "New York" = "America/New York";
+          };
+          position = {
+            top = 0;
+            left = 0;
+            height = 1;
+            width = 1;
+          };
+          refreshInterval = 15;
+          sort = "alphabetical";
+        };
+        security = {
+          enabled = true;
+          position = {
+            top = 1;
+            left = 0;
+            height = 1;
+            width = 1;
+          };
+          refreshInterval = 300;
+        };
+        prettyweather = {
+          enabled = true;
+          city = "Berlin";
+          position = {
+            top = 0;
+            left = 1;
+            height = 1;
+            width = 1;
+          };
+          refreshInterval = 300;
+        };
+        cmdrunner = {
+          enabled = true;
+          args = [ "status" ];
+          cmd = "traadfri";
+          position = {
+            top = 1;
+            left = 1;
+            height = 1;
+            width = 1;
+          };
+          refreshInterval = 2;
+        };
+      };
+    };
+  });
 in {
   imports = [
     ./hardware-configuration.nix