diff --git a/Cargo.lock b/Cargo.lock
index 03f77fd..a36e154 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -685,7 +685,8 @@ dependencies = [
 [[package]]
 name = "druid"
 version = "0.8.3"
-source = "git+https://github.com/linebender/druid.git#c02452ddeebc527992e8f112f434f23ce24c934d"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ece41814b410c87e6379441caa7316539500b2e387b8d691f2ba5c0f4aff631"
 dependencies = [
  "console_error_panic_hook",
  "druid-derive",
@@ -710,7 +711,8 @@ dependencies = [
 [[package]]
 name = "druid-derive"
 version = "0.5.0"
-source = "git+https://github.com/linebender/druid.git#c02452ddeebc527992e8f112f434f23ce24c934d"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1234fc14b0c07e3d4ff2ae8862eb2c24c87e1f3d6eeef0ec6b9d564fe13cef2"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -720,7 +722,8 @@ dependencies = [
 [[package]]
 name = "druid-shell"
 version = "0.8.3"
-source = "git+https://github.com/linebender/druid.git#c02452ddeebc527992e8f112f434f23ce24c934d"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7682d9c8fbf934504c30970775bfcfba7858a600f2f6e56bed331989958350fc"
 dependencies = [
  "anyhow",
  "bitflags",
@@ -749,6 +752,17 @@ dependencies = [
  "wio",
 ]
 
+[[package]]
+name = "druid-widget-nursery"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fe4e3cbc027e5c9a4f1c135b339ac92aaf99681a7c1b51ff63111b5719194e5"
+dependencies = [
+ "druid",
+ "log",
+ "tracing",
+]
+
 [[package]]
 name = "dtmm"
 version = "0.1.0"
@@ -759,6 +773,7 @@ dependencies = [
  "colors-transform",
  "confy",
  "druid",
+ "druid-widget-nursery",
  "dtmt-shared",
  "futures",
  "lazy_static",
diff --git a/crates/dtmm/Cargo.toml b/crates/dtmm/Cargo.toml
index c98a1e9..2b368ed 100644
--- a/crates/dtmm/Cargo.toml
+++ b/crates/dtmm/Cargo.toml
@@ -10,7 +10,7 @@ bitflags = "1.3.2"
 clap = { version = "4.0.15", features = ["color", "derive", "std", "cargo", "string", "unicode"] }
 color-eyre = "0.6.2"
 confy = "0.5.1"
-druid = { git = "https://github.com/linebender/druid.git", features = ["im", "serde", "image", "png", "jpeg", "bmp", "webp", "svg"] }
+druid = { version = "0.8", features = ["im", "serde", "image", "png", "jpeg", "bmp", "webp", "svg"] }
 dtmt-shared = { path = "../../lib/dtmt-shared", version = "*" }
 futures = "0.3.25"
 oodle-sys = { path = "../../lib/oodle-sys", version = "*" }
@@ -30,3 +30,4 @@ strip-ansi-escapes = "0.1.1"
 lazy_static = "1.4.0"
 colors-transform = "0.2.11"
 usvg = "0.25.0"
+druid-widget-nursery = "0.1"
diff --git a/crates/dtmm/src/ui/window/main.rs b/crates/dtmm/src/ui/window/main.rs
index c8d5bf9..988882e 100644
--- a/crates/dtmm/src/ui/window/main.rs
+++ b/crates/dtmm/src/ui/window/main.rs
@@ -2,16 +2,17 @@ use std::str::FromStr;
 use std::sync::Arc;
 
 use druid::im::Vector;
-use druid::lens;
 use druid::widget::{
     Checkbox, CrossAxisAlignment, Either, Flex, Image, Label, LineBreaking, List,
     MainAxisAlignment, Maybe, Scroll, SizedBox, Split, Svg, SvgData, TextBox, ViewSwitcher,
 };
+use druid::{lens, Env};
 use druid::{
     Color, FileDialogOptions, FileSpec, FontDescriptor, FontFamily, LensExt, SingleUse, Widget,
     WidgetExt, WindowDesc, WindowId,
 };
 use druid::{Data, ImageBuf, LifeCycleCtx};
+use druid_widget_nursery::WidgetExt as _;
 use lazy_static::lazy_static;
 
 use crate::state::{
@@ -50,11 +51,21 @@ fn build_top_bar() -> impl Widget<State> {
             state.current_view = View::Settings;
         });
 
-    let check_update_button = Button::with_label("Check for updates")
-        .on_click(|ctx, _: &mut State, _| {
-            ctx.submit_command(ACTION_START_CHECK_UPDATE);
-        })
-        .disabled_if(|data, _| data.is_update_in_progress);
+    let check_update_button = {
+        let make_button = || {
+            Button::with_label("Check for updates").on_click(|ctx, _: &mut State, _| {
+                ctx.submit_command(ACTION_START_CHECK_UPDATE);
+            })
+        };
+
+        Either::new(
+            |data, _| data.nexus_api_key.is_empty(),
+            make_button()
+                .tooltip(|_: &State, _: &Env| "A Nexus API key is required")
+                .disabled_if(|_, _| true),
+            make_button().disabled_if(|data, _| data.is_update_in_progress),
+        )
+    };
 
     let deploy_button = {
         let icon = Svg::new(SvgData::from_str(theme::icons::ALERT_CIRCLE).expect("invalid SVG"))