Some SDK are missing when creating a build configuration

[GilDev]

Hello,

I have recently been working on other Zephyr projects that use non-Nordic MCUs. I installed raw Zephyr in my documents folder (“C:\Users\gilles.devillers.SECTRONIC\zephyr”). Now, when I’m trying to build my older nRF projects, it didn’t work, showing weird error messages about colliding Python versions. I deleted my build configurations, but now I can’t create a new one: the SDK list only shows Zephyr, but not the installed ncs ones anymore:

But when exporting the debug information from the VSCode extension, the SDK are all listed:

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{
  "platform": {
    "os": "win32",
    "osVersion": "Windows 11 Pro",
    "osKernel": "10.0.26100",
    "vscode": "1.98.1",
    "electron": "34.2.0",
    "node": "v20.18.2"
  },
  "system": {
    "date": "2025-03-27T16:01:24.933Z",
    "vscodeRoot": "c:\\Program Files\\Microsoft VS Code\\resources\\app",
    "nrfConnectForDesktopInstalled": true,
    "vscodeUptime": "80:07:06",
    "osUptime": "80:10:57",
    "cpu": "11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz"
  },
  "workspace": {
    "name": "Untitled (Workspace)",
    "workspaceFile": "1714068093748",
    "folders": [
      "c:\\Users\\gilles.devillers.SECTRONIC\\aerobox",
      "c:\\Users\\gilles.devillers.SECTRONIC\\https_client_new",
      "c:\\Users\\gilles.devillers.SECTRONIC\\hci_lpuart_new",
      "c:\\Users\\gilles.devillers.SECTRONIC\\lte_ble_gateway",
      "c:\\Users\\gilles.devillers.SECTRONIC\\peripheral",
      "c:\\Users\\gilles.devillers.SECTRONIC\\aws_iot",
      "c:\\Users\\gilles.devillers.SECTRONIC\\at_client"
    ]
  },
  "sdks": [
    {
      "version": "v2.9.0",
      "path": "c:\\ncs\\v2.9.0"
    },
    {
      "version": "v2.7.0",
      "path": "c:\\ncs\\v2.7.0_new"
    },
    {
      "version": "v2.6.1",
      "path": "c:\\ncs\\v2.6.1"
    },
    {
      "version": "v2.5.99-dev1",
      "path": "c:\\ncs\\v2.5.99-dev1"
    },
    {
      "version": "v2.5.2",
      "path": "c:\\ncs\\v2.5.2"
    },
    {
      "version": "v2.5.1",
      "path": "c:\\ncs\\v2.5.1"
    },
    {
      "version": "v2.5.0",
      "path": "c:\\ncs\\v2.5.0"
    },
    {
      "version": "v4.1.99",
      "path": "c:\\Users\\gilles.devillers.SECTRONIC"
    },
    {
      "version": "v3.7.0-rc2",
      "path": "c:\\Users\\gilles.devillers.SECTRONIC\\zephyrproject"
    },
    {
      "version": "v3.6.99",
      "path": "c:\\ncs\\v2.7.0"
    }
  ],
  "activeBuild": "c:\\Users\\gilles.devillers.SECTRONIC\\peripheral\\build_aerobox\\mcuboot",
  "apps": [
    {
      "workspace": "c:\\Users\\gilles.devillers.SECTRONIC\\aerobox",
      "uri": "c:\\Users\\gilles.devillers.SECTRONIC\\aerobox",
      "buildConfigurations": []
    },
    {
      "workspace": "c:\\Users\\gilles.devillers.SECTRONIC\\at_client",
      "uri": "c:\\Users\\gilles.devillers.SECTRONIC\\at_client",
      "buildConfigurations": [
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\at_client\\build",
          "name": "build",
          "boardId": "[email protected]/nrf9160/ns",
          "type": "Sysbuild",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.9.0",
          "toolchain": "nRF Connect SDK Toolchain v2.9.0"
        }
      ]
    },
    {
      "workspace": "c:\\Users\\gilles.devillers.SECTRONIC\\aws_iot",
      "uri": "c:\\Users\\gilles.devillers.SECTRONIC\\aws_iot",
      "buildConfigurations": [
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\aws_iot\\build",
          "name": "build",
          "boardId": "[email protected]/nrf9160/ns",
          "type": "Sysbuild",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.9.0",
          "toolchain": "nRF Connect SDK Toolchain v2.9.0"
        }
      ]
    },
    {
      "workspace": "c:\\Users\\gilles.devillers.SECTRONIC\\hci_lpuart_new",
      "uri": "c:\\Users\\gilles.devillers.SECTRONIC\\hci_lpuart_new",
      "buildConfigurations": [
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\hci_lpuart_new\\build",
          "name": "build",
          "boardId": "nrf9160dk_nrf52840",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        },
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\hci_lpuart_new\\build_aerobox",
          "name": "build_aerobox",
          "boardId": "aerobox_nrf52",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        },
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\hci_lpuart_new\\build_aerobox_debug",
          "name": "build_aerobox_debug",
          "boardId": "aerobox_nrf52",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        },
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\hci_lpuart_new\\build_debug",
          "name": "build_debug",
          "boardId": "nrf9160dk_nrf52840",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        }
      ]
    },
    {
      "workspace": "c:\\Users\\gilles.devillers.SECTRONIC\\https_client_new",
      "uri": "c:\\Users\\gilles.devillers.SECTRONIC\\https_client_new",
      "buildConfigurations": [
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\https_client_new\\build",
          "name": "build",
          "boardId": "nrf9160dk_nrf9160_ns",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        },
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\https_client_new\\build_mbedtls",
          "name": "build_mbedtls",
          "boardId": "nrf9160dk_nrf9160_ns",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        }
      ]
    },
    {
      "workspace": "c:\\Users\\gilles.devillers.SECTRONIC\\lte_ble_gateway",
      "uri": "c:\\Users\\gilles.devillers.SECTRONIC\\lte_ble_gateway",
      "buildConfigurations": [
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\lte_ble_gateway\\build",
          "name": "build",
          "boardId": "nrf9160dk_nrf9160_ns",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        }
      ]
    },
    {
      "workspace": "c:\\Users\\gilles.devillers.SECTRONIC\\peripheral",
      "uri": "c:\\Users\\gilles.devillers.SECTRONIC\\peripheral",
      "buildConfigurations": [
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\peripheral\\build",
          "name": "build",
          "boardId": "nrf9160dk_nrf9160_ns",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        },
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\peripheral\\build_aerobox",
          "name": "build_aerobox",
          "boardId": "aerobox_ns",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        },
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\peripheral\\build_aerobox_debug",
          "name": "build_aerobox_debug",
          "boardId": "aerobox_ns",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        },
        {
          "id": "c:\\Users\\gilles.devillers.SECTRONIC\\peripheral\\build_debug",
          "name": "build_debug",
          "boardId": "nrf9160dk_nrf9160_ns",
          "type": "Zephyr",
          "isChild": false,
          "isStale": false,
          "taskBindings": {
            "build": [],
            "pristineBuild": [],
            "flash": [],
            "eraseAndFlash": []
          },
          "sdk": "c:\\ncs\\v2.6.1",
          "toolchain": "nRF Connect SDK Toolchain v2.6.1"
        }
      ]
    }
  ],
  "toolchains": [
    {
      "version": "2.9.0",
      "path": "c:\\ncs\\toolchains\\b620d30767"
    },
    {
      "version": "2.7.0",
      "path": "c:\\ncs\\toolchains\\ce3b5ff664"
    },
    {
      "version": "2.6.1",
      "path": "c:\\ncs\\toolchains\\cf2149caf2"
    },
    {
      "version": "2.5.2",
      "path": "c:\\ncs\\toolchains\\c57af46cb7"
    },
    {
      "version": "2.5.1",
      "path": "c:\\ncs\\toolchains\\c57af46cb7"
    },
    {
      "version": "2.5.0",
      "path": "c:\\ncs\\toolchains\\c57af46cb7"
    },
    {
      "version": "0.16.5",
      "path": "c:\\Users\\gilles.devillers.SECTRONIC\\zephyr-sdk-0.16.5"
    }
  ],
  "connectedDevices": [],
  "tools": {
    "C:\\ncs\\toolchains\\b620d30767\\opt\\zephyr-sdk\\arm-zephyr-eabi\\bin\\arm-zephyr-eabi-gcc.exe": "0.17.0",
    "C:\\Program Files\\SEGGER\\JLink_V794i\\JLink.exe": "7.94i",
    "C:\\Program Files\\Nordic Semiconductor\\nrf-command-line-tools\\bin\\nrfjprog.exe": "10.23.2",
    "C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\Scripts\\nrfutil.exe": "7.12.0",
    "C:\\ncs\\toolchains\\b620d30767\\cmake": "3.21.0",
    "C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\Scripts\\west.exe": "1.2.0",
    "C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\python.exe": "3.12.4",
    "C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\ninja.exe": "1.10.2",
    "C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\gperf.exe": "3.1",
    "C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\dtc.exe": "1.4.7",
    "C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\gn.exe": "2202",
    "C:\\ncs\\toolchains\\b620d30767\\mingw64\\bin\\git.exe": "2.37.3.windows.1",
    "arm-gdbPath": "c:\\ncs\\toolchains\\b620d30767\\opt\\zephyr-sdk\\arm-zephyr-eabi\\bin\\arm-zephyr-eabi-gdb.exe",
    "riscv-gdbPath": "C:\\ncs\\toolchains\\b620d30767\\opt\\zephyr-sdk\\riscv64-zephyr-elf\\bin\\riscv64-zephyr-elf-gdb.exe"
  },
  "nrfutil": {
    "nrfutil-device": {
      "version": "2.7.9",
      "binPath": "c:\\Users\\gilles.devillers.SECTRONIC\\.vscode\\extensions\\nordic-semiconductor.nrf-connect-2025.1.127-win32-x64\\platform\\nrfutil\\bin\\nrfutil-device",
      "jlinkInfo": {
        "name": "JlinkARM",
        "version": "JLink_V7.94i",
        "versionFormat": "string"
      }
    },
    "nrfutil-toolchain-manager": {
      "version": "0.14.4",
      "binPath": "c:\\Users\\gilles.devillers.SECTRONIC\\.vscode\\extensions\\nordic-semiconductor.nrf-connect-2025.1.127-win32-x64\\platform\\nrfutil\\bin\\nrfutil-toolchain-manager"
    }
  },
  "environment": {
    "westEnv": {
      "HOME": "C:\\Users\\gilles.devillers.SECTRONIC",
      "HOMEDRIVE": "C:",
      "HOMEPATH": "\\Users\\gilles.devillers.SECTRONIC",
      "PATH": "C:\\ncs\\toolchains\\b620d30767;C:\\ncs\\toolchains\\b620d30767\\mingw64\\bin;C:\\ncs\\toolchains\\b620d30767\\bin;C:\\ncs\\toolchains\\b620d30767\\opt\\bin;C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\Scripts;C:\\ncs\\toolchains\\b620d30767\\opt\\nanopb\\generator-bin;C:\\ncs\\toolchains\\b620d30767\\opt\\zephyr-sdk\\arm-zephyr-eabi\\bin;C:\\ncs\\toolchains\\b620d30767\\opt\\zephyr-sdk\\riscv64-zephyr-elf\\bin;c:\\Users\\gilles.devillers.SECTRONIC\\.vscode\\extensions\\nordic-semiconductor.nrf-connect-2025.1.127-win32-x64\\platform\\nrfutil\\lib\\nrfutil-toolchain-manager;C:\\Program Files\\Common Files\\Oracle\\Java\\javapath;C:\\Program Files (x86)\\VMware\\VMware Player\\bin\\;C:\\Program Files\\Zulu\\zulu-21\\bin\\;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files\\PuTTY\\;C:\\Program Files (x86)\\NetSarang\\Xshell 7\\;C:\\Program Files (x86)\\NetSarang\\Xftp 7\\;C:\\Program Files\\Amazon\\AWSCLIV2\\;C:\\Program Files\\dotnet\\;C:\\Program Files\\Nordic Semiconductor\\nrf-command-line-tools\\bin\\;C:\\Program Files\\Microsoft VS Code\\bin;C:\\Program Files (x86)\\GitExtensions\\;C:\\ProgramData\\chocolatey\\bin;C:\\Program Files\\CMake\\bin;C:\\Program Files\\Git\\cmd;C:\\Program Files (x86)\\MBPoll;C:\\Program Files\\Docker\\Docker\\resources\\bin;C:\\Program Files\\usbipd-win\\;C:\\Program Files\\Meld\\;C:\\Strawberry\\c\\bin;C:\\Strawberry\\perl\\site\\bin;C:\\Strawberry\\perl\\bin;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\Packages\\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\\LocalCache\\local-packages\\Python311\\Scripts;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\Microsoft\\WindowsApps\\;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Roaming\\Python\\Python38\\Scripts;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\Programs\\Ollama;C:\\Program Files\\OpenOCD\\bin;C:\\Program Files\\Cppcheck;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\GitHubDesktop\\bin;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\Microsoft\\WinGet\\Packages\\schollz.croc_Microsoft.Winget.Source_8wekyb3d8bbwe;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\Packages\\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\\LocalCache\\local-packages\\Python310\\Scripts;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\Programs\\Python\\Python313\\;C:\\Users\\gilles.devillers.SECTRONIC\\AppData\\Local\\Programs\\Python\\Python313\\Scripts\\;",
      "ZEPHYR_BASE": "c:\\ncs\\v2.9.0\\zephyr",
      "ZEPHYR_TOOLCHAIN_VARIANT": "zephyr",
      "ZEPHYR_SDK_INSTALL_DIR": "C:\\ncs\\toolchains\\b620d30767\\opt\\zephyr-sdk",
      "PYTHONPATH": "C:\\ncs\\toolchains\\b620d30767\\opt\\bin;C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\Lib;C:\\ncs\\toolchains\\b620d30767\\opt\\bin\\Lib\\site-packages"
    },
    "inherited": {
      "HOME": "C:\\Users\\gilles.devillers.SECTRONIC",
      "HOMEDRIVE": "C:",
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How can I repair my development environment so that the VSCode extension properly shows all my installed SDKs?

Thanks.

[dejans]

Hi,

I have recently been working on other Zephyr projects that use non-Nordic MCUs. I installed raw Zephyr in my documents folder (“C:\Users\gilles.devillers.SECTRONIC\zephyr”).

Can you show exact steps you took when installing raw Zephyr?

Now, when I’m trying to build my older nRF projects, it didn’t work, showing weird error messages about colliding Python versions.

Which Python versions are colliding? Can you show the error? 

Can you build NCS projects successfully from command line?

Best regards,
Dejan

[GilDev]

Thanks for your reply.

I followed [this exact guide](docs.zephyrproject.org/.../index.html) on Windows 11. But as I’ve seen somewhere in the docs, it seems that sometimes Zephyr defaults to C:\Users\<user>\zephyr for some commands.

I have tried building another project for which I still have some build configurations set, but the error is different, it seems to be using a directory from my other project that is not at all in the opened workspace (sorry, pasting here is because the editor is glitching when trying to add as code): https://pastebin.com/B5Bs4G94

How can I build NCS projects with the command line? Just using west build? Anyway I can’t create a build configuration anymore for my project as the SDK only show “Zephyr v4.1.99\*” and not the ncs anymore, do you know how I can do it then?

Thanks, have a nice day!

[dejans]

Hi,

It is probably the case that you have workspace application. If the application is under Zephyr, then you will not be able to build it with some other SDKs. In this case the solution is to copy/move your application somewhere else. Please let me know if this suggestion helps in resolving the issue.

Best regards,
Dejan

[GilDev]

Hi,

It is not under Zephyr. As shown in the debug support information, my nRF app is at C:\Users\gilles.devillers.SECTRONIC\aerobox\. My ncs tools are in C:\ncs\. My separate Zephyr installation is in C:\Users\gilles.devillers.SECTRONIC\aerobox\zephyr.

Yet the extension won’t list the SDK when creating a build configuration, but will list them in the debug information…

Thanks, regards.

[dejans]

Hi,

Do you have workspace application?

Have you tried to copy/move your application outside of Zephyr path (C:\Users\gilles.devillers.SECTRONIC\aerobox\zephyr)?

Best regards,
Dejan

[GilDev]

I’m sorry but this forum’s editor is completely broken: I have been trying to reply for 30 minutes and I only got bugs and “An error occurred. Please try again or contact your administrator.” errors, whatever browser I use. Here’s my complete message: https://pastebin.com/auWw61vC

Is it please possible to get a more direct contact, maybe via email?

Thanks, best regards.

[GilDev]

After numerous attempts, it seems that deleting everything (including that snarkly .west directory) and reinstalling the SDK (while removing the more recent toolchain) helped. I successfully managed to build my project again. Not putting projects at the same root level, as dejans  said, is mandatory. Thanks for the help!