Swift Package Index

Build Information

Failed to build Prelude, reference 3.0.1 (a048b7), with Swift 6.3 for macOS (SPM) on 10 Apr 2026 09:28:22 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/robrix/Prelude.git
Reference: 3.0.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/robrix/Prelude
 * tag               3.0.1      -> FETCH_HEAD
HEAD is now at a048b7a Merge pull request #61 from nxtstep/doc/swift-package-manager
Cloned https://github.com/robrix/Prelude.git
Revision (git rev-parse @):
a048b7af84fc25a1fd0af62e1dfe34c685cd446f
SUCCESS checkout https://github.com/robrix/Prelude.git at 3.0.1
========================================
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": "prelude",
      "name": "Prelude",
      "url": "https://github.com/robrix/Prelude.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Prelude",
      "traits": [
        "default"
      ],
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/robrix/Prelude.git
[1/820] Fetching prelude
Fetched https://github.com/robrix/Prelude.git from cache (0.73s)
Creating working copy for https://github.com/robrix/Prelude.git
Working copy of https://github.com/robrix/Prelude.git resolved at 3.0.1 (a048b7a)
warning: '.resolve-product-dependencies': dependency 'prelude' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/robrix/Prelude.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)
[3/11] Emitting module Prelude
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
[4/11] Compiling Prelude Tuple.swift
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
[5/11] Compiling Prelude Prelude.swift
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
[6/11] Compiling Prelude Optional.swift
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
[7/11] Compiling Prelude Compose.swift
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
[8/11] Compiling Prelude Flip.swift
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
[9/11] Compiling Prelude Fix.swift
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
[10/11] Compiling Prelude Application.swift
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
[11/11] Compiling Prelude Curry.swift
<unknown>:0: error: invalid value '3' in '-swift-version 3'
<unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5', '6'
BUILD FAILURE 6.3 macosSpm