diff --git a/pkgs/by-name/ni/nimdow/package.nix b/pkgs/by-name/ni/nimdow/package.nix
index 7a5542c2c05f..974bb430ce30 100644
--- a/pkgs/by-name/ni/nimdow/package.nix
+++ b/pkgs/by-name/ni/nimdow/package.nix
@@ -3,19 +3,21 @@
 buildNimPackage (finalAttrs: {
   pname = "nimdow";
 
-  version = "0.7.37";
-
-  requiredNimVersion = 1;
+  version = "0.7.38";
 
   src = fetchFromGitHub {
     owner = "avahe-kellenberger";
     repo = finalAttrs.pname;
     rev = "v${finalAttrs.version}";
-    hash = "sha256-930wDS0UW65QzpUHHOuM25oi/OhFmG0Q7N05ftu7XlI=";
+    hash = "sha256-GPu3Z63rFBgCCV7bdBg9cJh5thv2xrv/nSMa5Q/zp48=";
   };
 
   lockFile = ./lock.json;
 
+  nimFlags = [
+    "--deepcopy:on"
+  ];
+
   postInstall = ''
     install -D config.default.toml $out/share/nimdow/config.default.toml
     install -D nimdow.desktop $out/share/applications/nimdow.desktop