Verify canary release

• I verified that the issue exists in the latest Next.js canary release

Provide environment information

Operating System:
 Platform: darwin
 Arch: x64
 Version: Darwin Kernel Version 22.3.0: Mon Jan 30 20:42:11 PST 2023; root:xnu-8792813~2/RELEASE_X86_64
 Binaries:
 Node: 18.12.1
 npm: 8.19.2
 Yarn: 1.22.19
 pnpm: 8.1.0
 Relevant packages:
 next: 13.2.4
 eslint-config-next: 13.2.3
 react: 18.2.0
 react-dom: 18.2.0

Which area(s) of Next.js are affected? (leave empty if unsure)

Standalone mode (output: "standalone")

Link to the code that reproduces this issue

https://github.com/wenerme/ChatGPT-Next-Web/blob/b0907ac44fc623b79348bd3fcccff1ad48d712f6/app/api/chat-stream/route.ts#L60-L62

To Reproduce

export const config: PageConfig = {
 runtime: process.env.NEXT_RUNTIME,
};

Unsupported node type "MemberExpression"

Or

export const config: PageConfig = {
 runtime: process.env.STANDALONE ? "nodejs" : "edge",
};

Unsupported node type "ConditionalExpression"

Describe the Bug

PageConfig should allowed simple expression

Expected Behavior

Conditional page runtime works as expected

Which browser are you using? (if relevant)

No response

How are you deploying your application? (if relevant)

No response