\n\nFrom what I understand, according to the error logged, the issue is caused by the resulting css tree having nested `@source` declarations.\n\n### Additional context\n\nI'm working on migrating an existing website that was built using Bootstrap (lol) and I'd like to use layers to ensure the newer css gets a higher priority than the old one.\n\nUsing `@import \"tailwindcss\" layer(tailwindcss);` results in all the tailwind stuff being scoped to the `tailwindcss` layer (eg. `tailwindcss.theme`, `tailwindcss.base`…).\n\nHowever, when I try to do the same for `@import \"@nuxt/ui\"` I get the previously mentioned error.\n\nI've tried using both the same and a different layer name than the one I use for tailwind but I still get the error.\n\n### Logs\n\n```shell-script\nERROR Pre-transform error: @source cannot be nested. 12:42:31 PM\n Plugin: @tailwindcss/vite:generate:serve\n File: /project/workspace/app/assets/css/main.css\n```",[3134,3137,3140],{"name":3135,"color":3136},"bug","d73a4a",{"name":3138,"color":3139},"v3","49DCB8",{"name":3141,"color":3142},"triage","ffffff",4503,"nuxt","ui","open","`@import \"@nuxt/ui\" layer(layer-name);` not working","2025-07-11T13:35:06Z","https://github.com/nuxt/ui/issues/4503",0.64086986,{"description":3152,"labels":3153,"number":3156,"owner":3144,"repository":3145,"state":3157,"title":3158,"updated_at":3159,"url":3160,"score":3161},"### Environment\n\n- Operating System: Windows_NT\n- Node Version: v22.17.1\n- Nuxt Version: 4.0.1\n- CLI Version: 3.27.0\n- Nitro Version: 2.12.4\n- Package Manager: npm@11.5.1\n- Builder: -\n- User Config: compatibilityDate, devtools, modules, css\n- Runtime Modules: @nuxt/ui@3.3.0\n- Build Modules: -\n\n\n\nnpm list\nC:\\xxx>npm list\nnuxt-app@ C:\\xxx\n+-- @nuxt/ui@3.3.0\n+-- @nuxtjs/tailwindcss@6.14.0\n+-- autoprefixer@10.4.21\n+-- nuxt@4.0.1\n+-- postcss@8.5.6\n+-- tailwindcss@3.4.17\n+-- typescript@5.8.3\n+-- vue-router@4.5.1\n`-- vue@3.5.18\n\n\n### Version\n\nv3.3.0\n\n### Reproduction\n\n-\n\n### Description\n\nAfter following the installation guide https://ui.nuxt.com/getting-started/installation/nuxt\n\nI'm getting this error:\nCan't resolve 'tailwindcss' in 'C:\\xxx\\app\\assets\\css' at createError (C:/xxx/node_modules/h3/dist/index.mjs:71:15) at C:/xxx/node_modules/@nuxt/vite-builder/dist/index.mjs:403:21) at async processMessage (C:/xxx/node_modules/@nuxt/vite-builder/dist/index.mjs:386:30)\n\n\n### Additional context\n\n_No response_\n\n### Logs\n\n```shell-script\n\n```",[3154,3155],{"name":3135,"color":3136},{"name":3141,"color":3142},4617,"closed","Can't resolve 'tailwindcss'","2025-07-28T11:08:23Z","https://github.com/nuxt/ui/issues/4617",0.56645584,{"description":3163,"labels":3164,"number":3171,"owner":3144,"repository":3144,"state":3157,"title":3172,"updated_at":3173,"url":3174,"score":3175},"### Environment\n\n------------------------------\r\n- Operating System: Linux\r\n- Node Version: v18.16.0\r\n- Nuxt Version: 3.5.0\r\n- Nitro Version: 2.4.1\r\n- Package Manager: pnpm@8.5.1\r\n- Builder: vite\r\n- User Config: -\r\n- Runtime Modules: -\r\n- Build Modules: -\r\n------------------------------\n\n### Reproduction\n\nhttps://github.com/productdevbook/bug-tailwindcss\n\n### Describe the bug\n\npnpm i\r\npnpm dev web\r\n\r\nthis color dont see .md files\r\n\r\n```\r\n modules: [\r\n '@nuxtjs/tailwindcss',\r\n '@nuxt/content',\r\n ],\r\n``` \r\n\r\n\r\n\r\nif `layer` nuxt.config.ts in change array order, will working tailwindcss\r\n\r\n```\r\n modules: [\r\n '@nuxt/content',\r\n '@nuxtjs/tailwindcss',\r\n ],\r\n``` \r\n\r\n\r\n\n\n### Additional context\n\n_No response_\n\n### Logs\n\n_No response_",[3165,3168],{"name":3166,"color":3167},"3.x","29bc7f",{"name":3169,"color":3170},"pending triage","E99695",21415,"tailwindcss modules order problem","2023-06-06T22:05:17Z","https://github.com/nuxt/nuxt/issues/21415",0.60436004,{"description":3177,"labels":3178,"number":3183,"owner":3144,"repository":3144,"state":3157,"title":3184,"updated_at":3185,"url":3186,"score":3187},"### Environment\n\n- Operating System: Darwin\n- Node Version: v20.11.0\n- Nuxt Version: 3.15.2\n- CLI Version: 3.20.0\n- Nitro Version: 2.10.4\n- Package Manager: npm@10.8.3\n- Builder: -\n- User Config: modules, devtools, app, css, colorMode, runtimeConfig, routeRules, watch, experimental, compatibilityDate, vite, primevue, tailwindcss\n- Runtime Modules: @primevue/nuxt-module@4.2.5, @nuxtjs/tailwindcss@6.13.1, @nuxtjs/color-mode@3.5.2, @nuxt/eslint@0.7.5\n- Build Modules: -\n\n### Reproduction\n\nI setup two examples on Stackblitz, checkout the `app.vue`:\n- [Working with 3.15.2](https://stackblitz.com/edit/github-5q6fvymf?file=app.vue)\n- [Failing with 3.15.3](https://stackblitz.com/edit/github-5q6fvymf-otol8ppp?file=app.vue)\n\n### Describe the bug\n\nSince version `3.15.3` the `resolveConfig` method does no longer work\n\n### Additional context\n\nI am using https://nuxt.com/modules/tailwindcss. **It works fine with 3.15.2 and older.**\n\n### Logs\n\n```shell-script\n[nuxt] [request error] [unhandled] [500] Cannot find module './lib/public/resolve-config'\n```",[3179,3180],{"name":3169,"color":3170},{"name":3181,"color":3182},"possible regression","B90A42",30795,"resolveConfig with tailwindcss does not work in 3.15.3","2025-02-08T22:12:49Z","https://github.com/nuxt/nuxt/issues/30795",0.6220184,{"labels":3189,"number":3198,"owner":3144,"repository":3144,"state":3157,"title":3199,"updated_at":3200,"url":3201,"score":3202},[3190,3191,3192,3195],{"name":3166,"color":3167},{"name":3169,"color":3170},{"name":3193,"color":3194},"windows","C681FD",{"name":3196,"color":3197},"needs reproduction","FBCA04",14142,"Nuxt 3.x.x latest doesn't build on Windows 11, but does on Ubuntu 22.04","2023-01-19T17:25:53Z","https://github.com/nuxt/nuxt/issues/14142",0.6308735,{"description":3204,"labels":3205,"number":3209,"owner":3144,"repository":3144,"state":3157,"title":3210,"updated_at":3211,"url":3212,"score":3213},"### Environment\n\n- Operating System: `Darwin`\r\n- Node Version: `v20.11.1`\r\n- Nuxt Version: `3.11.2`\r\n- CLI Version: `3.11.1`\r\n- Nitro Version: `2.9.6`\r\n- Package Manager: `yarn@4.2.2`\r\n- Builder: `-`\r\n- User Config: `devtools`, `debug`, `hooks`, `modules`, `plugins`, `nitro`, `runtimeConfig`, `dayjs`, `postcss`, `app`, `css`, `apollo`, `carousel`, `tour`, `vue`, `routeRules`\r\n- Runtime Modules: `@nuxtjs/tailwindcss@6.12.0`, `@nuxtjs/device@3.1.1`, `@nuxt/image@1.4.0`, `@pinia/nuxt@0.5.1`, `@pinia-plugin-persistedstate/nuxt@1.2.0`, `dayjs-nuxt@2.1.9`, `vue3-carousel-nuxt@1.1.1`, `@nuxtjs/apollo@5.0.0-alpha.14`, `nuxt-tour@0.0.9`, `@nuxtjs/i18n@8.3.1`\r\n- Build Modules: `-`\r\n\n\n### Reproduction\n\nCannot reproduce the issue either on new repo or stackblitz\r\n\r\nUsing \r\n\r\n \"nuxt\": \"^3.11.2\",\r\n \"@nuxtjs/tailwindcss\": \"^6.12.0\",\n\n### Describe the bug\n\nIn the below image in nuxt 3 bg-transparent is added at last but it is overridden by bg-yocket-neutral-100\r\n\r\n\u003Cimg width=\"647\" alt=\"Screenshot 2024-05-28 at 5 46 06 PM\" src=\"https://github.com/nuxt/nuxt/assets/45727492/081685a9-7c97-4f4e-8449-e3f0bfbc0719\">\r\n\r\nIn nuxt 2 the behaviour was opposite\r\n\u003Cimg width=\"1115\" alt=\"Screenshot 2024-05-28 at 5 52 22 PM\" src=\"https://github.com/nuxt/nuxt/assets/45727492/f4d6d5f5-d323-4312-bb37-46a4fb52f776\">\r\n\r\n\r\nThis same thing is happening throughout the project\n\n### Additional context\n\n_No response_\n\n### Logs\n\n_No response_",[3206,3207,3208],{"name":3166,"color":3167},{"name":3169,"color":3170},{"name":3196,"color":3197},27385,"Tailwindcss added at last is not applied","2024-05-30T05:43:05Z","https://github.com/nuxt/nuxt/issues/27385",0.6351132,{"labels":3215,"number":3218,"owner":3144,"repository":3144,"state":3157,"title":3219,"updated_at":3220,"url":3221,"score":3222},[3216,3217],{"name":3166,"color":3167},{"name":3169,"color":3170},13475,"Tailwind module not working","2023-01-19T16:57:29Z","https://github.com/nuxt/nuxt/issues/13475",0.6359324,{"description":3224,"labels":3225,"number":3228,"owner":3144,"repository":3144,"state":3157,"title":3229,"updated_at":3230,"url":3231,"score":3232},"### Environment\r\n\r\nBuild breaks with postcss for this specific package. Error screenshot below:\r\n\r\n\r\n### Reproduction\r\n\r\nI am sharing stackblitz for reproduction:\r\n\r\nhttps://stackblitz.com/edit/nuxt-starter-sv2vxi?file=nuxt.config.ts,tailwind.config.js\r\n\r\n### Describe the bug\r\n\r\nUnable to start dev server\r\n\r\n### Additional context\r\n\r\n_No response_\r\n\r\n### Logs\r\n\r\n_No response_",[3226,3227],{"name":3166,"color":3167},{"name":3169,"color":3170},27277,"PostCSS breaking on adding tailwind plugin for nuxt-tour specifically, unable to start nuxt dev server","2024-05-24T08:41:36Z","https://github.com/nuxt/nuxt/issues/27277",0.6366626,{"labels":3234,"number":3237,"owner":3144,"repository":3144,"state":3157,"title":3238,"updated_at":3239,"url":3240,"score":3241},[3235,3236],{"name":3166,"color":3167},{"name":3169,"color":3170},13531,"Nuxt 3 postcss 8 support","2023-01-19T17:03:44Z","https://github.com/nuxt/nuxt/issues/13531",0.63761985,{"description":3243,"labels":3244,"number":3249,"owner":3144,"repository":3144,"state":3157,"title":3250,"updated_at":3251,"url":3252,"score":3253},"\u003C!-- 💚 Thanks for your time to make Nuxt better with your feedbacks 💚\r\n\r\n**IMPORTANT** Before reporting a bug:\r\n\r\n- Please make sure that you have read through Nuxt documentation: https://nuxtjs.org\r\n- If issue is related to a module please create the issue in corresponding repository\r\n- Ensure using latest version of nuxt dependencies using `yarn upgrade nuxt` or `npm upgrade nuxt`\r\n\r\n👍 A properly detailed bug report can save a LOT of time and help fixing issues as soon as possible.\r\n-->\r\n\r\n### Versions\r\n\r\n- nuxt: v2.15.8\r\n- node: v16.15.0\r\n- pnpm: v7.11.0\r\n\r\n### Reproduction\r\n\r\n\u003C!--\r\nLink to a minimal test case based on one of:\r\n- A fork of https://template.nuxtjs.org\r\n- A GitHub repository that can reproduce the bug\r\nWithout a reproduction, it is so hard to address problem :(\r\n-->\r\n\r\n\u003Cdetails open>\r\n\u003Csummary>Additional Details\u003C/summary>\r\n\u003Cbr>\r\n\u003C!-- Attaching `nuxt.config`, dependencies, logs or code snippets would help to find the issue -->\r\n\u003C/details>\r\n\r\n### Steps to reproduce\r\n\r\n```bash\r\ngit clone https://github.com/Jinjiang/try-nuxt\r\npnpm install\r\npnpm dev\r\n```\r\n\r\n### What is Expected?\r\n\r\nThe start page:\r\n\r\n\r\n\r\nThis screenshot was taken by re-installing the dependencies by `yarn`.\r\n\r\n### What is actually happening?\r\n\r\nError received:\r\n\r\n\r\n",[3245,3246],{"name":3169,"color":3170},{"name":3247,"color":3248},"2.x","d4c5f9",10762,"Newly created Nuxt project is unable to run with pnpm","2023-01-22T15:48:35Z","https://github.com/nuxt/nuxt/issues/10762",0.643107,["Reactive",3255],{},["Set"],["ShallowReactive",3258],{"$fTRc1wZytZ_XrK4EfJfei_Sz-An4H4Yy6syhVxH_PVJc":-1,"$f9KqzqOLpw0h86_t-3aiOJOtNZs_Vul4c-DC2WzNJOek":-1},"/nuxt/ui/4339"]