Fix for absolute paths on builded tsconfig.json on Nuxt 3.6.0.

nuxt.config.ts

import { relative, resolve } from 'node:path';

export default defineNuxtConfig({
  hooks: {
    'prepare:types': ({ tsConfig }) => {
      if (!tsConfig?.compilerOptions?.paths) {
        return;
      }

      const rootDir = process.cwd();
      const nuxtDirectory = resolve(rootDir, '.nuxt');
      const baseUrl = relative(nuxtDirectory, rootDir);

      const relativePaths = Object.entries<string[]>(
        tsConfig.compilerOptions.paths,
      ).reduce<Record<string, string[]>>((paths, [pattern, locations]) => {
        if (Array.isArray(locations)) {
          paths[pattern] = locations.map((location) => {
            return relative(rootDir, location);
          });
        }

        return paths;
      }, {});

      tsConfig.compilerOptions.baseUrl = baseUrl;
      tsConfig.compilerOptions.paths = relativePaths;
    },
  },
});

tsconfig.after.json

// Generated by nuxi
{
  "compilerOptions": {
    "forceConsistentCasingInFileNames": true,
    "jsx": "preserve",
    "target": "ESNext",
    "module": "ESNext",
    "moduleResolution": "Node",
    "skipLibCheck": true,
    "strict": true,
    "allowJs": true,
    "baseUrl": "..",
    "noEmit": true,
    "resolveJsonModule": true,
    "allowSyntheticDefaultImports": true,
    "types": [
      "node"
    ],
    "paths": {
      "~": [
        ""
      ],
      "~/*": [
        "*"
      ],
      "@": [
        ""
      ],
      "@/*": [
        "*"
      ],
      "~~": [
        ""
      ],
      "~~/*": [
        "*"
      ],
      "@@": [
        ""
      ],
      "@@/*": [
        "*"
      ],
      "assets": [
        "assets"
      ],
      "public": [
        "public"
      ],
      "public/*": [
        "public/*"
      ],
      "#app": [
        "../../node_modules/nuxt/dist/app"
      ],
      "#app/*": [
        "../../node_modules/nuxt/dist/app/*"
      ],
      "vue-demi": [
        "../../node_modules/nuxt/dist/app/compat/vue-demi"
      ],
      "#vue-router": [
        ".nuxt/vue-router"
      ],
      "#imports": [
        ".nuxt/imports"
      ],
      "#build": [
        ".nuxt"
      ],
      "#build/*": [
        ".nuxt/*"
      ],
      "#components": [
        "/home/dbarjs/_dev/flux-jobboard/apps/job-preferences/.nuxt/components"
      ]
    }
  },
  "include": [
    "./nuxt.d.ts",
    "../**/*"
  ],
  "exclude": [
    "../dist",
    "../.output"
  ]
}

tsconfig.before.json

// Generated by nuxi
{
  "compilerOptions": {
    "forceConsistentCasingInFileNames": true,
    "jsx": "preserve",
    "target": "ESNext",
    "module": "ESNext",
    "moduleResolution": "Node",
    "skipLibCheck": true,
    "strict": true,
    "allowJs": true,
    "baseUrl": "/home/app/packages/web",
    "noEmit": true,
    "resolveJsonModule": true,
    "allowSyntheticDefaultImports": true,
    "types": [
      "node"
    ],
    "paths": {
      "~": [
        "/home/app/packages/web"
      ],
      "~/*": [
        "/home/app/packages/web/*"
      ],
      "@": [
        "/home/app/packages/web"
      ],
      "@/*": [
        "/home/app/packages/web/*"
      ],
      "~~": [
        "/home/app/packages/web"
      ],
      "~~/*": [
        "/home/app/packages/web/*"
      ],
      "@@": [
        "/home/app/packages/web"
      ],
      "@@/*": [
        "/home/app/packages/web/*"
      ],
      "assets": [
        "/home/app/packages/web/assets"
      ],
      "public": [
        "/home/app/packages/web/public"
      ],
      "public/*": [
        "/home/app/packages/web/public/*"
      ],
      "#app": [
        "/home/app/node_modules/nuxt/dist/app"
      ],
      "#app/*": [
        "/home/app/node_modules/nuxt/dist/app/*"
      ],
      "vue-demi": [
        "/home/app/node_modules/nuxt/dist/app/compat/vue-demi"
      ],
      "#vue-router": [
        "/home/app/packages/web/.nuxt/vue-router"
      ],
      "#imports": [
        "/home/app/packages/web/.nuxt/imports"
      ],
      "#build": [
        "/home/app/packages/web/.nuxt"
      ],
      "#build/*": [
        "/home/app/packages/web/.nuxt/*"
      ],
      "#components": [
        "/home/app/packages/web/.nuxt/components"
      ]
    }
  },
  "include": [
    "./nuxt.d.ts",
    "../**/*"
  ],
  "exclude": [
    "../dist",
    "../.output"
  ]
}

Related issue: nuxt/nuxt#21827