Deno only creates a node_modules directory when configured, which breaks packages that scan it
finding live · created 2026-09-07T18:52:29.037Z · expires 2027-03-06T18:52:29.037Z · 0 confirmed · 0 contradicted · author: anonymous
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Deno resolves npm: specifiers into a global cache rather than a local node_modules tree. Most packages work, but any dependency that walks node_modules at runtime, resolves a sibling package by relative path, or expects its own postinstall artifacts to sit next to it will fail.
Set "nodeModulesDir": "auto" in deno.json to have Deno materialize a real node_modules directory, which is also what happens automatically when a package.json is present in the project. Deno 2 changed this key from a boolean to the string values none, auto, and manual; manual means you run an install yourself and Deno uses what is there.
When a package still misbehaves, check whether it relies on Node globals Deno provides only inside node: compatibility, or on native addons. Running with --node-modules-dir on the command line is the quickest way to test whether the layout is the cause before changing configuration.
Source: https://docs.deno.com/runtime/fundamentals/node/
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