Hi,

I tried to update maven to 3.9.5 but failed because maven did not find
synccontext:

starting phase `build'
Buildfile: /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/build.xml

compile:
    [javac] Compiling 27 source files to /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/build/classes
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionRangeResolver.java:57: error: package org.eclipse.aether.spi.synccontext does not exist
    [javac] import org.eclipse.aether.spi.synccontext.SyncContextFactory;
    [javac]                                          ^
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionRangeResolver.java:76: error: cannot find symbol
    [javac]     private SyncContextFactory syncContextFactory;
    [javac]             ^
    [javac]   symbol:   class SyncContextFactory
    [javac]   location: class DefaultVersionRangeResolver
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionRangeResolver.java:88: error: cannot find symbol
    [javac]             SyncContextFactory syncContextFactory,
    [javac]             ^
    [javac]   symbol:   class SyncContextFactory
    [javac]   location: class DefaultVersionRangeResolver
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionRangeResolver.java:107: error: cannot find symbol
    [javac]     public DefaultVersionRangeResolver setSyncContextFactory(SyncContextFactory syncContextFactory) {
    [javac]                                                              ^
    [javac]   symbol:   class SyncContextFactory
    [javac]   location: class DefaultVersionRangeResolver
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionResolver.java:65: error: package org.eclipse.aether.spi.synccontext does not exist
    [javac] import org.eclipse.aether.spi.synccontext.SyncContextFactory;
    [javac]                                          ^
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionResolver.java:85: error: cannot find symbol
    [javac]     private SyncContextFactory syncContextFactory;
    [javac]             ^
    [javac]   symbol:   class SyncContextFactory
    [javac]   location: class DefaultVersionResolver
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionResolver.java:97: error: cannot find symbol
    [javac]             SyncContextFactory syncContextFactory,
    [javac]             ^
    [javac]   symbol:   class SyncContextFactory
    [javac]   location: class DefaultVersionResolver
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionResolver.java:116: error: cannot find symbol
    [javac]     public DefaultVersionResolver setSyncContextFactory(SyncContextFactory syncContextFactory) {
    [javac]                                                         ^
    [javac]   symbol:   class SyncContextFactory
    [javac]   location: class DefaultVersionResolver
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionRangeResolver.java:98: error: cannot find symbol
    [javac]         setSyncContextFactory(locator.getService(SyncContextFactory.class));
    [javac]                                                  ^
    [javac]   symbol:   class SyncContextFactory
    [javac]   location: class DefaultVersionRangeResolver
    [javac] /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionResolver.java:107: error: cannot find symbol
    [javac]         setSyncContextFactory(locator.getService(SyncContextFactory.class));
    [javac]                                                  ^
    [javac]   symbol:   class SyncContextFactory
    [javac]   location: class DefaultVersionResolver
    [javac] Note: /tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultModelResolver.java uses or overrides a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] 10 errors

BUILD FAILED
/tmp/guix-build-maven-resolver-provider-3.9.5.drv-0/apache-maven-3.9.5/build.xml:1: Compile failed; see the compiler error output for details.

Total time: 0 seconds
error: in phase 'build': uncaught exception:
%exception #<&invoke-error program: "ant" arguments: ("jar") exit-status: 1 term-signal: #f stop-signal: #f> 
phase `build' failed after 1.2 seconds
command "ant" "jar" failed with status 1
builder for `/gnu/store/vwq5vwa2iwplwxkxq20mlipb28vi4p8z-maven-resolver-provider-3.9.5.drv' failed with exit code 1
build of /gnu/store/vwq5vwa2iwplwxkxq20mlipb28vi4p8z-maven-resolver-provider-3.9.5.drv failed
View build log at '/var/log/guix/drvs/vw/q5vwa2iwplwxkxq20mlipb28vi4p8z-maven-resolver-provider-3.9.5.drv.gz'.
cannot build derivation `/gnu/store/i5kgkmp528xbqq7wslf0d2rgp3lys5iq-maven-3.9.5.drv': 1 dependencies couldn't be built
guix build: error: build of `/gnu/store/i5kgkmp528xbqq7wslf0d2rgp3lys5iq-maven-3.9.5.drv' failed


Used patch: