diff --git a/shell.nix b/shell.nix
index 8cd6b84ba..6ceb13483 100644
--- a/shell.nix
+++ b/shell.nix
@@ -197,9 +197,9 @@ let
     UPLOAD_S3_KEY_ID=''${MINIO_ACCESS_KEY}
     UPLOAD_S3_KEY=''${MINIO_SECRET_KEY}
 
-    SMTPHOST=''${SMTPHOST}
-    SMTPPORT=''${SMTPPORT}
-    SMTPSSL=''${SMTPSSL}
+    # SMTPHOST=''${SMTPHOST}
+    # SMTPPORT=''${SMTPPORT}
+    # SMTPSSL=''${SMTPSSL}
     EOF
 
     set +xe
@@ -269,6 +269,7 @@ in pkgs.mkShell {
       export NIX_PATH=nixpkgs=${nixpkgsPath}
     ''}
 
+    export TZDIR=${pkgs.tzdata}/share/zoneinfo
     export CHROME_BIN=${pkgs.chromium}/bin/chromium
   '';
   nativeBuildInputs = [develop inDevelop killallUni2work diffRunning]