Swift Package IndexBuild Information
Failed to build MailCore, reference 3.1.2 (437167), with Swift 6.3 for Wasm on 12 Apr 2026 17:46:21 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1Build Log
========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/liveui/mailcore.git
Reference: 3.1.2
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/liveui/mailcore
* tag 3.1.2 -> FETCH_HEAD
HEAD is now at 4371672 upgrading packages
Cloned https://github.com/liveui/mailcore.git
Revision (git rev-parse @):
43716728291958a4bbe278720c85aef13cb8c248
SUCCESS checkout https://github.com/liveui/mailcore.git at 3.1.2
========================================
Build
========================================
Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/liveui/mailcore.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1
wasm-6.3-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:d69f4e7582c319245442d62a08b2d7c7fd5a0c0c69f5d2ef11d1530cd8d3329b
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest
Fetching https://github.com/twof/VaporMailgunService.git
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Working copy of https://github.com/IBM-Swift/Swift-SMTP.git resolved at 5.1.2
warning: 'swift-nio-zlib-support': ignoring declared target(s) 'swift-nio-zlib-support' in the system package
warning: 'swift-nio-ssl-support': ignoring declared target(s) 'swift-nio-ssl-support' in the system package
warning: 'bluesslservice': Conflicting identity for bluesocket: dependency 'github.com/kitura/bluesocket' and dependency 'github.com/ibm-swift/bluesocket' both point to the same package identity 'bluesocket'. The dependencies are introduced through the following chains: (A) /host/spi-builder-workspace->github.com/ibm-swift/swift-smtp->github.com/ibm-swift/bluesslservice->github.com/kitura/bluesocket (B) /host/spi-builder-workspace->github.com/ibm-swift/swift-smtp->github.com/ibm-swift/bluesocket. If there are multiple chains that lead to the same dependency, only the first chain is shown here. To see all chains use debug output option. To resolve the conflict, coordinate with the maintainer of the package that introduces the conflicting dependency. This will be escalated to an error in future versions of SwiftPM.
warning: 'spi-builder-workspace': dependency 'loggerapi' is not used by any target
warning: you may be able to install openssl using your system-packager:
apt-get install openssl libssl-dev
warning: couldn't find pc file for openssl
warning: you may be able to install openssl using your system-packager:
apt-get install openssl libssl-dev
warning: couldn't find pc file for openssl
Building for debugging...
[0/52] Write sources
In file included from /host/spi-builder-workspace/.build/checkouts/swift-nio-ssl/Sources/CNIOOpenSSL/shims.c:16:
/host/spi-builder-workspace/.build/checkouts/swift-nio-ssl/Sources/CNIOOpenSSL/include/c_nio_openssl.h:17:10: fatal error: 'openssl/conf.h' file not found
17 | #include <openssl/conf.h>
| ^~~~~~~~~~~~~~~~
1 error generated.
[36/52] Compiling CNIOOpenSSL shims.c
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/CNIOSHA1/c_nio_sha1.c:47:10: fatal error: 'sys/cdefs.h' file not found
47 | #include <sys/cdefs.h>
| ^~~~~~~~~~~~~
1 error generated.
[36/52] Compiling CNIOSHA1 c_nio_sha1.c
[36/52] Compiling CNIOHTTPParser c_nio_http_parser.c
[36/52] Compiling CNIOZlib empty.c
[36/52] Compiling CNIOLinux ifaddrs-android.c
In file included from /host/spi-builder-workspace/.build/checkouts/swift-nio-ssl/Sources/CNIOOpenSSL/helpers.c:14:
/host/spi-builder-workspace/.build/checkouts/swift-nio-ssl/Sources/CNIOOpenSSL/include/c_nio_openssl.h:17:10: fatal error: 'openssl/conf.h' file not found
17 | #include <openssl/conf.h>
| ^~~~~~~~~~~~~~~~
[36/52] Compiling CNIOOpenSSL helpers.c
[36/52] Compiling CNIOLinux shim.c
[36/52] Write swift-version-24593BA9C3E375BF.txt
BUILD FAILURE 6.3 wasm