diff --git a/packages/cli/cli/versions.yml b/packages/cli/cli/versions.yml
index bff68f0a56e..1e0b86a4731 100644
--- a/packages/cli/cli/versions.yml
+++ b/packages/cli/cli/versions.yml
@@ -1,3 +1,12 @@
+- changelog_entry:
+  - summary: |
+      Fix an issue where some postman environment variables (e.g. API key) were not substituted
+      when running fern generate.
+    type: fix
+  created_at: '2024-09-03'
+  ir_version: 53
+  version: 0.41.0-rc1
+
 - changelog_entry:
   - summary: | 
       Every fern folder that is using OpenAPI must configure an explicit location to the 
diff --git a/packages/cli/generation/remote-generation/remote-workspace-runner/src/createAndStartJob.ts b/packages/cli/generation/remote-generation/remote-workspace-runner/src/createAndStartJob.ts
index 2e4f02bfabe..0256cfb4a7e 100644
--- a/packages/cli/generation/remote-generation/remote-workspace-runner/src/createAndStartJob.ts
+++ b/packages/cli/generation/remote-generation/remote-workspace-runner/src/createAndStartJob.ts
@@ -8,7 +8,6 @@ import {
     ROOT_API_FILENAME
 } from "@fern-api/configuration";
 import { createFiddleService, getFiddleOrigin } from "@fern-api/core";
-import { replaceEnvVariables } from "@fern-api/core-utils";
 import { AbsoluteFilePath, dirname, join, RelativeFilePath, stringifyLargeObject } from "@fern-api/fs-utils";
 import {
     migrateIntermediateRepresentationForGenerator,
@@ -94,7 +93,8 @@ async function createJob({
     whitelabel: FernFiddle.WhitelabelConfig | undefined;
     absolutePathToPreview: AbsoluteFilePath | undefined;
 }): Promise<FernFiddle.remoteGen.CreateJobResponse> {
-    const isPreview = absolutePathToPreview != null;
+    const remoteGenerationService = createFiddleService({ token: token.value });
+
     const generatorConfig: FernFiddle.GeneratorConfigV2 = {
         id: generatorInvocation.name,
         version: generatorInvocation.version,
@@ -103,19 +103,6 @@ async function createJob({
         publishMetadata: generatorInvocation.publishMetadata
     };
 
-    /** Sugar to substitute templated env vars in a standard way */
-    const substituteEnvVars = <T>(stringOrObject: T) =>
-        replaceEnvVariables(
-            stringOrObject,
-            { onError: (e) => context.failAndThrow(e) },
-            { substituteAsEmpty: isPreview }
-        );
-
-    const generatorConfigsWithEnvVarSubstitutions = substituteEnvVars(generatorConfig);
-    const whitelabelWithEnvVarSubstiutions = whitelabel != null ? substituteEnvVars(whitelabel) : undefined;
-
-    const remoteGenerationService = createFiddleService({ token: token.value });
-
     let fernDefinitionMetadata: FernFiddle.remoteGen.FernDefinitionMetadata | undefined;
     // Only write definition if output mode is github
     if (generatorInvocation.outputMode.type.startsWith("github")) {
@@ -214,14 +201,14 @@ async function createJob({
         apiName: workspace.definition.rootApiFile.contents.name,
         version,
         organizationName: organization,
-        generators: [generatorConfigsWithEnvVarSubstitutions],
+        generators: [generatorConfig],
         uploadToS3: shouldUploadToS3({
             outputMode: generatorInvocation.outputMode,
             generatorInvocation,
             absolutePathToPreview,
             shouldLogS3Url
         }),
-        whitelabel: whitelabelWithEnvVarSubstiutions,
+        whitelabel,
         fernDefinitionMetadata,
         preview: absolutePathToPreview != null
     });
diff --git a/packages/cli/generation/remote-generation/remote-workspace-runner/src/runRemoteGenerationForGenerator.ts b/packages/cli/generation/remote-generation/remote-workspace-runner/src/runRemoteGenerationForGenerator.ts
index 2524861d869..f636061e978 100644
--- a/packages/cli/generation/remote-generation/remote-workspace-runner/src/runRemoteGenerationForGenerator.ts
+++ b/packages/cli/generation/remote-generation/remote-workspace-runner/src/runRemoteGenerationForGenerator.ts
@@ -13,6 +13,7 @@ import { createAndStartJob } from "./createAndStartJob";
 import { pollJobAndReportStatus } from "./pollJobAndReportStatus";
 import { RemoteTaskHandler } from "./RemoteTaskHandler";
 import { SourceUploader } from "./SourceUploader";
+import { replaceEnvVariables } from "@fern-api/core-utils";
 
 export async function runRemoteGenerationForGenerator({
     projectConfig,
@@ -91,20 +92,31 @@ export async function runRemoteGenerationForGenerator({
         ir.sourceConfig = sourceConfig;
     }
 
+    /** Sugar to substitute templated env vars in a standard way */
+    const isPreview = absolutePathToPreview != null;
+    const substituteEnvVars = <T>(stringOrObject: T) =>
+        replaceEnvVariables(
+            stringOrObject,
+            { onError: (e) => interactiveTaskContext.failAndThrow(e) },
+            { substituteAsEmpty: isPreview }
+        );
+
+    const generatorInvocationWithEnvVarSubstitutions = substituteEnvVars(generatorInvocation);
+
     const job = await createAndStartJob({
         projectConfig,
         workspace,
         organization,
-        generatorInvocation,
+        generatorInvocation: generatorInvocationWithEnvVarSubstitutions,
         context: interactiveTaskContext,
         version,
         intermediateRepresentation: {
             ...ir,
-            publishConfig: getPublishConfig({ generatorInvocation })
+            publishConfig: getPublishConfig({ generatorInvocation: generatorInvocationWithEnvVarSubstitutions })
         },
         shouldLogS3Url,
         token,
-        whitelabel,
+        whitelabel: whitelabel != null ? substituteEnvVars(whitelabel) : undefined,
         irVersionOverride,
         absolutePathToPreview
     });