diff --git a/build-logic/basics/src/main/kotlin/gradlebuild/basics/BuildEnvironment.kt b/build-logic/basics/src/main/kotlin/gradlebuild/basics/BuildEnvironment.kt
--- a/build-logic/basics/src/main/kotlin/gradlebuild/basics/BuildEnvironment.kt	(revision e9251e572c9bd1d01e503a0dfdf43aedaeecdc3f)
+++ b/build-logic/basics/src/main/kotlin/gradlebuild/basics/BuildEnvironment.kt	(date 1698014209745)
@@ -26,6 +26,7 @@
 import org.gradle.api.provider.Provider
 import org.gradle.internal.os.OperatingSystem
 import org.gradle.kotlin.dsl.*
+import java.util.Objects
 
 
 abstract class BuildEnvironmentExtension {
@@ -78,6 +79,7 @@
         }
     }
     return if (execOutput.result.get().exitValue == 0) execOutput.standardOutput.asText.get().trim()
+    else if (Objects.nonNull(System.getenv("COMMIT_HASH"))) System.getenv("COMMIT_HASH")
     else "<unknown>" // It's a source distribution, we don't know.
 }