Build Information
Failed to build swift-cardano-uplc, reference 0.1.4 (707df7), with Swift 6.1 for Wasm on 2 May 2026 07:51:12 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1Build Log
========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Kingpin-Apps/swift-cardano-uplc.git
Reference: 0.1.4
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: git branch -m <name>
From https://github.com/Kingpin-Apps/swift-cardano-uplc
* tag 0.1.4 -> FETCH_HEAD
HEAD is now at 707df7b bump: version 0.1.3 → 0.1.4
Cloned https://github.com/Kingpin-Apps/swift-cardano-uplc.git
Revision (git rev-parse @):
707df7b756bd4dc3fdfd265794ed1a990c67b58b
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/Kingpin-Apps/swift-cardano-uplc.git at 0.1.4
========================================
Build
========================================
Selected platform: wasm
Swift version: 6.1
Building package at path: $PWD
https://github.com/Kingpin-Apps/swift-cardano-uplc.git
https://github.com/Kingpin-Apps/swift-cardano-uplc.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1
wasm-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:276d66a16377d3ee059b2e3429cbc1154d9f01e42871e5d702fd5d8b9044d93d
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest
Fetching https://github.com/Kingpin-Apps/swift-blst.git
Fetching https://github.com/krzyzanowskim/CryptoSwift.git
Fetching https://github.com/attaswift/BigInt.git
Fetching https://github.com/21-DOT-DEV/swift-secp256k1
Fetching https://github.com/Kingpin-Apps/swift-ncal.git
Fetching https://github.com/apple/swift-log.git
[1/97] Fetching swift-blst
[98/4975] Fetching swift-blst, bigint
[781/18362] Fetching swift-blst, bigint, cryptoswift
[964/25172] Fetching swift-blst, bigint, cryptoswift, swift-log
[2430/25665] Fetching swift-blst, bigint, cryptoswift, swift-log, swift-ncal
[11781/36363] Fetching swift-blst, bigint, cryptoswift, swift-log, swift-ncal, swift-secp256k1
Fetched https://github.com/apple/swift-log.git from cache (1.61s)
Fetching https://github.com/Kingpin-Apps/swift-cardano-core.git
[11825/29553] Fetching swift-blst, bigint, cryptoswift, swift-ncal, swift-secp256k1
[13362/33301] Fetching swift-blst, bigint, cryptoswift, swift-ncal, swift-secp256k1, swift-cardano-core
Fetched https://github.com/Kingpin-Apps/swift-ncal.git from cache (2.44s)
[18719/32808] Fetching swift-blst, bigint, cryptoswift, swift-secp256k1, swift-cardano-core
Fetched https://github.com/Kingpin-Apps/swift-cardano-core.git from cache (1.13s)
[15052/29060] Fetching swift-blst, bigint, cryptoswift, swift-secp256k1
Fetched https://github.com/krzyzanowskim/CryptoSwift.git from cache (4.84s)
Fetched https://github.com/Kingpin-Apps/swift-blst.git from cache (4.94s)
Fetched https://github.com/attaswift/BigInt.git from cache (4.96s)
Fetched https://github.com/21-DOT-DEV/swift-secp256k1 from cache (5.01s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.12.0 (6.22s)
Computing version for https://github.com/21-DOT-DEV/swift-secp256k1
Computed https://github.com/21-DOT-DEV/swift-secp256k1 at 0.22.0 (1.34s)
Computing version for https://github.com/Kingpin-Apps/swift-ncal.git
error: Dependencies could not be resolved because 'swift-ncal' >= 0.2.1 contains incompatible tools version (6.2.0) and root depends on 'swift-ncal' 0.2.2..<1.0.0.
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1
wasm-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:276d66a16377d3ee059b2e3429cbc1154d9f01e42871e5d702fd5d8b9044d93d
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest
Updating https://github.com/krzyzanowskim/CryptoSwift.git
Updating https://github.com/21-DOT-DEV/swift-secp256k1
Updating https://github.com/attaswift/BigInt.git
Updating https://github.com/apple/swift-log.git
Updating https://github.com/Kingpin-Apps/swift-ncal.git
Updating https://github.com/Kingpin-Apps/swift-blst.git
Updated https://github.com/apple/swift-log.git (0.46s)
Updated https://github.com/attaswift/BigInt.git (0.46s)
Updating https://github.com/Kingpin-Apps/swift-cardano-core.git
Updated https://github.com/Kingpin-Apps/swift-ncal.git (0.49s)
Updated https://github.com/Kingpin-Apps/swift-blst.git (0.49s)
Updated https://github.com/21-DOT-DEV/swift-secp256k1 (0.72s)
Updated https://github.com/krzyzanowskim/CryptoSwift.git (0.72s)
Updated https://github.com/Kingpin-Apps/swift-cardano-core.git (0.37s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.12.0 (1.99s)
Computing version for https://github.com/21-DOT-DEV/swift-secp256k1
Computed https://github.com/21-DOT-DEV/swift-secp256k1 at 0.22.0 (1.30s)
Computing version for https://github.com/Kingpin-Apps/swift-ncal.git
error: Dependencies could not be resolved because 'swift-ncal' >= 0.2.1 contains incompatible tools version (6.2.0) and root depends on 'swift-ncal' 0.2.2..<1.0.0.
BUILD FAILURE 6.1 wasm