try fixing Sonar + KMP...

buildSrc/src/main/kotlin/buildsrc/conventions/lang/kotlin-multiplatform-jvm.gradle.kts

@@ -2,6 +2,7 @@ package buildsrc.conventions.lang
 
 plugins {
     id("buildsrc.conventions.lang.kotlin-multiplatform-base")
+    id("buildsrc.conventions.sonarqube")
 }
 
 kotlin {
@@ -9,3 +10,13 @@ kotlin {
         withJava()
     }
 }
+
+
+sonar {
+    properties {
+        property("sonar.sources", "src/jvmMain/kotlin")
+        property("sonar.test", "src/jvmTest/kotlin")
+        property("sonar.junit.reportPaths", "build/test-results/jvmTest")
+        property("sonar.surefire.reportsPath", "build/test-results/jvmTest")
+    }
+}

buildSrc/src/main/kotlin/buildsrc/conventions/sonarqube.gradle.kts

@@ -17,6 +17,7 @@
 
 package buildsrc.conventions
 
+import org.sonarqube.gradle.SonarExtension.SONAR_DEPRECATED_TASK_NAME
 import org.sonarqube.gradle.SonarTask
 
 /**
@@ -38,3 +39,8 @@ tasks.withType<SonarTask>().configureEach {
     // workaround for https://github.com/Kotlin/kotlinx-kover/issues/394
     dependsOn(tasks.matching { it.name == "koverXmlReport" })
 }
+
+tasks.matching { it.name == SONAR_DEPRECATED_TASK_NAME }.configureEach {
+    // this task is deprecated, use 'sonar' instead
+    group = "other"
+}