diff --git a/.changeset/strange-badgers-obey.md b/.changeset/strange-badgers-obey.md
new file mode 100644
index 00000000..57788e6d
--- /dev/null
+++ b/.changeset/strange-badgers-obey.md
@@ -0,0 +1,5 @@
+---
+"inngest": patch
+---
+
+Handle `chalk` being `undefined` in some environments
diff --git a/packages/inngest/src/helpers/consts.ts b/packages/inngest/src/helpers/consts.ts
index 0c639a7a..2d95e59d 100644
--- a/packages/inngest/src/helpers/consts.ts
+++ b/packages/inngest/src/helpers/consts.ts
@@ -164,7 +164,8 @@ export enum internalEvents {
   ScheduledTimer = "inngest/scheduled.timer",
 }
 
-export const logPrefix: string = chalk.magenta.bold("[Inngest]");
+export const logPrefix: string =
+  chalk?.magenta.bold("[Inngest]") || "[Inngest]";
 
 export const debugPrefix = "inngest";
 
diff --git a/packages/inngest/src/helpers/errors.ts b/packages/inngest/src/helpers/errors.ts
index 0d6b06b0..c15d7720 100644
--- a/packages/inngest/src/helpers/errors.ts
+++ b/packages/inngest/src/helpers/errors.ts
@@ -405,17 +405,19 @@ export const prettyError = ({
   stack,
   code,
 }: PrettyError): string => {
-  const { icon, colorFn } = (
+  const { icon, colorFn = (s: string) => s } = (
     {
-      error: { icon: "❌", colorFn: chalk.red },
-      warn: { icon: "⚠️", colorFn: chalk.yellow },
+      error: { icon: "❌", colorFn: chalk?.red },
+      warn: { icon: "⚠️", colorFn: chalk?.yellow },
     } satisfies Record<
       NonNullable<PrettyError["type"]>,
-      { icon: string; colorFn: (s: string) => string }
+      { icon: string; colorFn?: (s: string) => string }
     >
   )[type];
 
-  let header = `${icon}  ${chalk.bold.underline(whatHappened.trim())}`;
+  let header = `${icon}  ${
+    chalk?.bold.underline(whatHappened.trim()) || whatHappened.trim()
+  }`;
   if (stack) {
     header +=
       "\n" +