diff --git a/nixos/modules/services/development/jupyter/default.nix b/nixos/modules/services/development/jupyter/default.nix
index f20860af6e12..e598b0186450 100644
--- a/nixos/modules/services/development/jupyter/default.nix
+++ b/nixos/modules/services/development/jupyter/default.nix
@@ -118,15 +118,15 @@ in {
           in {
             displayName = "Python 3 for machine learning";
             argv = [
-              "$ {env.interpreter}"
+              "''${env.interpreter}"
               "-m"
               "ipykernel_launcher"
               "-f"
               "{connection_file}"
             ];
             language = "python";
-            logo32 = "$ {env.sitePackages}/ipykernel/resources/logo-32x32.png";
-            logo64 = "$ {env.sitePackages}/ipykernel/resources/logo-64x64.png";
+            logo32 = "''${env.sitePackages}/ipykernel/resources/logo-32x32.png";
+            logo64 = "''${env.sitePackages}/ipykernel/resources/logo-64x64.png";
           };
         }
       '';