Swift Package Index

Build Information

Failed to build Stacked, reference 0.3.1 (b510bc), with Swift 6.3 for macOS (SPM) on 14 Apr 2026 11:43:56 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/ml-archive/stacked.git
Reference: 0.3.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/ml-archive/stacked
 * tag               0.3.1      -> FETCH_HEAD
HEAD is now at b510bcb Merge pull request #20 from nodes-vapor/feature/add-library
Cloned https://github.com/ml-archive/stacked.git
Revision (git rev-parse @):
b510bcbd5fb3f84f3a78540a2c508f477ec44de8
SUCCESS checkout https://github.com/ml-archive/stacked.git at 0.3.1
Fetching https://github.com/nodes-vapor/cstack.git
[1/16] Fetching cstack
Fetched https://github.com/nodes-vapor/cstack.git from cache (0.59s)
Computing version for https://github.com/nodes-vapor/cstack.git
Computed https://github.com/nodes-vapor/cstack.git at 1.0.1 (1.25s)
Creating working copy for https://github.com/nodes-vapor/cstack.git
Working copy of https://github.com/nodes-vapor/cstack.git resolved at 1.0.1
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "traits": [
    "default"
  ],
  "dependencies": [
    {
      "identity": "stacked",
      "name": "Stacked",
      "url": "https://github.com/ml-archive/stacked.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/stacked",
      "traits": [
        "default"
      ],
      "dependencies": [
        {
          "identity": "cstack",
          "name": "CStack",
          "url": "https://github.com/nodes-vapor/cstack.git",
          "version": "1.0.1",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/cstack",
          "traits": [
            "default"
          ],
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/ml-archive/stacked.git
[1/337] Fetching stacked
Fetched https://github.com/ml-archive/stacked.git from cache (0.70s)
Fetching https://github.com/nodes-vapor/cstack.git from cache
Fetched https://github.com/nodes-vapor/cstack.git from cache (0.49s)
Computing version for https://github.com/nodes-vapor/cstack.git
Computed https://github.com/nodes-vapor/cstack.git at 1.0.1 (0.56s)
Creating working copy for https://github.com/nodes-vapor/cstack.git
Working copy of https://github.com/nodes-vapor/cstack.git resolved at 1.0.1
Creating working copy for https://github.com/ml-archive/stacked.git
Working copy of https://github.com/ml-archive/stacked.git resolved at 0.3.1 (b510bcb)
warning: 'cstack': ignoring declared target(s) 'CStack' in the system package
warning: '.resolve-product-dependencies': dependency 'stacked' is not used by any target
Found 1 product dependencies
  - CStack
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/ml-archive/stacked.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version--6988338F2F200930.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/4] Emitting module Stacked
<module-includes>:1:9: note: in file included from <module-includes>:1:
1 | #import "shim.h"
  |         `- note: in file included from <module-includes>:1:
2 |
/Users/admin/builder/spi-builder-workspace/.build/checkouts/cstack/shim.h:4:10: error: 'stack.h' file not found
2 | #define __CSTACK_SHIM_H__
3 |
4 | #include "stack.h"
  |          `- error: 'stack.h' file not found
5 |
6 | #endif
/Users/admin/builder/spi-builder-workspace/Sources/Stacked/Stacked.swift:1:8: error: could not build Objective-C module 'CStack'
 1 | import CStack
   |        `- error: could not build Objective-C module 'CStack'
 2 | import Foundation
 3 |
[4/4] Compiling Stacked Stacked.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
1 | #import "shim.h"
  |         `- note: in file included from <module-includes>:1:
2 |
/Users/admin/builder/spi-builder-workspace/.build/checkouts/cstack/shim.h:4:10: error: 'stack.h' file not found
2 | #define __CSTACK_SHIM_H__
3 |
4 | #include "stack.h"
  |          `- error: 'stack.h' file not found
5 |
6 | #endif
/Users/admin/builder/spi-builder-workspace/Sources/Stacked/Stacked.swift:1:8: error: could not build Objective-C module 'CStack'
 1 | import CStack
   |        `- error: could not build Objective-C module 'CStack'
 2 | import Foundation
 3 |
warning: 'cstack': ignoring declared target(s) 'CStack' in the system package
warning: failed to retrieve search paths with pkg-config; maybe pkg-config is not installed
warning: you may be able to install cstack using your system-packager:
    brew install vapor/tap/cstack
warning: you may be able to install cstack using your system-packager:
    brew install vapor/tap/cstack
BUILD FAILURE 6.3 macosSpm