try fixing process checker, again

buildSrc/src/main/kotlin/dev/adamko/kafkatorio/task/ProcessRunningSpec.kt

@@ -1,9 +1,11 @@
 package dev.adamko.kafkatorio.task
 
 import java.io.ByteArrayOutputStream
+import javax.inject.Inject
 import org.gradle.api.Task
 import org.gradle.api.internal.specs.ExplainingSpec
 import org.gradle.api.tasks.Exec
+import org.gradle.process.ExecOperations
 
 /** Checks if a process is running. Windows only. */
 class ProcessRunningSpec(
@@ -11,17 +13,21 @@ class ProcessRunningSpec(
   private val ignoreCase: Boolean = true,
 ) : ExplainingSpec<Task> {
 
+  @Inject
+  fun executor(): ExecOperations {
+    throw UnsupportedOperationException()
+  }
+
   override fun isSatisfiedBy(element: Task?): Boolean = whyUnsatisfied(element) == null
 
-  override fun whyUnsatisfied(element: Task?): String? = with(element) {
-
-    when (this) {
+  override fun whyUnsatisfied(element: Task?): String? {
+    return when (element) {
       null     -> "task is null"
       !is Exec -> "task ${this::class.simpleName} is not ${Exec::class.simpleName}"
       else     -> {
         return ByteArrayOutputStream().use { outputStream ->
 
-          project.exec {
+          executor().exec {
             commandLine("tasklist") // Windows only for now...
             standardOutput = outputStream
           }