diff --git a/devtools/gradle/src/main/java/io/quarkus/gradle/builder/QuarkusModelBuilder.java b/devtools/gradle/src/main/java/io/quarkus/gradle/builder/QuarkusModelBuilder.java
index f7958d06a7fe6..c13f9412e3ae1 100644
--- a/devtools/gradle/src/main/java/io/quarkus/gradle/builder/QuarkusModelBuilder.java
+++ b/devtools/gradle/src/main/java/io/quarkus/gradle/builder/QuarkusModelBuilder.java
@@ -107,7 +107,7 @@ public Set<WorkspaceModule> getWorkspace(Project project, LaunchMode mode) {
         for (Project subproject : project.getAllprojects()) {
             final Convention convention = subproject.getConvention();
             JavaPluginConvention javaConvention = convention.findPlugin(JavaPluginConvention.class);
-            if (javaConvention == null) {
+            if (javaConvention == null || !javaConvention.getSourceSets().getNames().contains(SourceSet.MAIN_SOURCE_SET_NAME)) {
                 continue;
             }
             modules.add(getWorkspaceModule(subproject, mode));
diff --git a/devtools/gradle/src/test/resources/multi-module-project/nomain/build.gradle b/devtools/gradle/src/test/resources/multi-module-project/nomain/build.gradle
new file mode 100644
index 0000000000000..b8cf19cf75668
--- /dev/null
+++ b/devtools/gradle/src/test/resources/multi-module-project/nomain/build.gradle
@@ -0,0 +1,8 @@
+plugins {
+    id 'java-library'
+}
+
+
+sourceSets {
+    remove(named("main"))
+}
diff --git a/devtools/gradle/src/test/resources/multi-module-project/settings.gradle b/devtools/gradle/src/test/resources/multi-module-project/settings.gradle
index 88b65c1ce09c9..671852ed649a6 100644
--- a/devtools/gradle/src/test/resources/multi-module-project/settings.gradle
+++ b/devtools/gradle/src/test/resources/multi-module-project/settings.gradle
@@ -16,4 +16,4 @@ pluginManagement {
 }
 rootProject.name='mutli-module-project'
 
-include 'common', 'application'
\ No newline at end of file
+include 'common', 'application', 'nomain'