diff --git a/modules/services/gpg-agent.nix b/modules/services/gpg-agent.nix
index 2174fdd793..510c25c030 100644
--- a/modules/services/gpg-agent.nix
+++ b/modules/services/gpg-agent.nix
@@ -44,7 +44,7 @@ let
   '';
 
   gpgNushellInitStr = ''
-    $env.GPG_TTY = (tty)
+    $env.GPG_TTY = (try { tty } catch { "" })
   ''
   + optionalString cfg.enableSshSupport ''
     ${gpgSshSupportStr} | ignore
diff --git a/tests/modules/services/gpg-agent/ssh-support.nix b/tests/modules/services/gpg-agent/ssh-support.nix
index 29016cf863..935ad938a6 100644
--- a/tests/modules/services/gpg-agent/ssh-support.nix
+++ b/tests/modules/services/gpg-agent/ssh-support.nix
@@ -19,6 +19,9 @@
     assertFileContains \
       home-files/.config/nushell/config.nu \
       '$env.SSH_AUTH_SOCK = $"(@gnupg@/bin/gpgconf --list-dirs agent-ssh-socket)"'
+    assertFileContains \
+      home-files/.config/nushell/config.nu \
+      '$env.GPG_TTY = (try { tty } catch { "" })'
     assertFileContains \
       home-files/.zshenv \
       'export SSH_AUTH_SOCK="$(@gnupg@/bin/gpgconf --list-dirs agent-ssh-socket)"'