diff --git a/build.gradle.kts b/build.gradle.kts
index a8346fc2..f1aa9d44 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -386,16 +386,25 @@ tasks {
         }
     }
 
+    var directory_containing_unpacked_jbr_win = "";
     val unpack_windows_JBR by registering(Copy::class) {
         dependsOn(resolveJBR_Win, fix_JNA_and_fix_BIN)
         from(tarTree("$jdkDir/jbr_jcef-windows-x64.tgz"))
         into("$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp")
 
         doLast {
-            System.err.println("--------- win jbr unpacked in " + "$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp")
-            File("$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp/").walk().forEach {
-                println(it)
+            //System.err.println("--------- win jbr unpacked in " + "$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp")
+            //File("$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp/").walk().forEach {
+            //    println(it)
+            //}
+            val path_tmp = File("$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp/").listFiles { file ->
+                file.isDirectory && file.name.startsWith("jbr")
+            }?.first()?.absolutePath
+
+            if (path_tmp != null) {
+                directory_containing_unpacked_jbr_win = path_tmp;
             }
+            System.err.println("--------- win jbr unpacked in " + directory_containing_unpacked_jbr_win)
         }
     }
 
@@ -403,7 +412,7 @@ tasks {
         dependsOn(resolveJBR_Win, build_fasten_safety_distribution, unpack_windows_JBR)
         archiveBaseName.set("fasten-${version}-Win")
         from("$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp/fasten-${version}/")
-        from("$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp/jbr_jcef-windows-x64") {
+        from(directory_containing_unpacked_jbr_win /*"$artifactsDir/com.mbeddr.formal.safetyDistribution/tmp/jbr_jcef-windows-x64"*/) {
 	        include("**/*.*")
 	        into("jbr")
 	    }