diff --git a/build.gradle b/build.gradle
index 0db2ad5..23cc6a0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -42,7 +42,7 @@ allprojects {
         }
     }
 
-    if (rootProject.hmc_graal_build) {
+    if (hmc_graal_build.toBoolean()) {
         sourceCompatibility = JavaVersion.VERSION_11
         targetCompatibility = JavaVersion.VERSION_11
     } else {
diff --git a/headlessmc-launcher/build.gradle b/headlessmc-launcher/build.gradle
index 739ff0a..680e140 100644
--- a/headlessmc-launcher/build.gradle
+++ b/headlessmc-launcher/build.gradle
@@ -100,7 +100,7 @@ shadowJar {
     dependsOn shadowBugWorkaround
     from shadowBugWorkaround
 
-    if (!hmc_graal_build) {
+    if (!hmc_graal_build.toBoolean()) {
         // TODO: fix this, since it breaks graalvm, because the resource is not available!!!
         // ignore the forge-cli jar from processResources as it will get expanded
         // that the runtime and lwjgl jars get expanded isnt problematic
@@ -122,7 +122,7 @@ shadowJar {
 graalvmNative {
     agent {
         defaultMode = "standard"
-        enabled = rootProject.hmc_graal_build
+        enabled = hmc_graal_build.toBoolean()
     }
     binaries {
         main {
diff --git a/headlessmc-modlauncher/build.gradle b/headlessmc-modlauncher/build.gradle
index be4658c..643fb43 100644
--- a/headlessmc-modlauncher/build.gradle
+++ b/headlessmc-modlauncher/build.gradle
@@ -1,4 +1,4 @@
-if (!rootProject.hmc_graal_build) {
+if (!hmc_graal_build.toBoolean()) {
     sourceSets {
         java9stub
         main {