diff --git a/kogito-build/kogito-dependencies-bom/pom.xml b/kogito-build/kogito-dependencies-bom/pom.xml
index 218ffd77cb7..001bec44501 100644
--- a/kogito-build/kogito-dependencies-bom/pom.xml
+++ b/kogito-build/kogito-dependencies-bom/pom.xml
@@ -85,7 +85,6 @@
     <version.org.postgresql>42.7.4</version.org.postgresql>
     <version.com.h2>2.3.232</version.com.h2> <!-- Overriding version 2.3.230 to fix https://github.com/h2database/h2database/issues/4079 -->
     <version.io.serverlessworkflow>4.0.5.Final</version.io.serverlessworkflow>
-    <!-- Aligned with Quarkus 2.7 (LTS) - see https://issues.redhat.com/browse/KOGITO-7971 -->
     <version.io.smallrye-open-api>3.10.0</version.io.smallrye-open-api>
     <version.org.awaitility>4.2.0</version.org.awaitility>
 
diff --git a/quarkus/addons/microprofile-config-service-catalog/deployment/pom.xml b/quarkus/addons/microprofile-config-service-catalog/deployment/pom.xml
index 8223eba7f36..e45895e4622 100644
--- a/quarkus/addons/microprofile-config-service-catalog/deployment/pom.xml
+++ b/quarkus/addons/microprofile-config-service-catalog/deployment/pom.xml
@@ -63,6 +63,9 @@
                             <version>${version.io.quarkus}</version>
                         </path>
                     </annotationProcessorPaths>
+                    <compilerArgs>
+                        <arg>-AlegacyConfigRoot=true</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
         </plugins>
diff --git a/quarkus/addons/microprofile-config-service-catalog/runtime/pom.xml b/quarkus/addons/microprofile-config-service-catalog/runtime/pom.xml
index 089aa2507f5..a5a3dc15915 100644
--- a/quarkus/addons/microprofile-config-service-catalog/runtime/pom.xml
+++ b/quarkus/addons/microprofile-config-service-catalog/runtime/pom.xml
@@ -100,6 +100,9 @@
                             <version>${version.io.quarkus}</version>
                         </path>
                     </annotationProcessorPaths>
+                    <compilerArgs>
+                        <arg>-AlegacyConfigRoot=true</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
         </plugins>
diff --git a/quarkus/addons/source-files/runtime/pom.xml b/quarkus/addons/source-files/runtime/pom.xml
index 634a43a7c80..09c8542d348 100644
--- a/quarkus/addons/source-files/runtime/pom.xml
+++ b/quarkus/addons/source-files/runtime/pom.xml
@@ -150,6 +150,9 @@
                             <version>${version.io.quarkus}</version>
                         </path>
                     </annotationProcessorPaths>
+                    <compilerArgs>
+                        <arg>-AlegacyConfigRoot=true</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
         </plugins>
diff --git a/quarkus/extensions/kogito-quarkus-decisions-extension/kogito-quarkus-decisions-deployment/pom.xml b/quarkus/extensions/kogito-quarkus-decisions-extension/kogito-quarkus-decisions-deployment/pom.xml
index bc91f46e926..1641e6accae 100644
--- a/quarkus/extensions/kogito-quarkus-decisions-extension/kogito-quarkus-decisions-deployment/pom.xml
+++ b/quarkus/extensions/kogito-quarkus-decisions-extension/kogito-quarkus-decisions-deployment/pom.xml
@@ -66,6 +66,9 @@
                             <version>${version.io.quarkus}</version>
                         </path>
                     </annotationProcessorPaths>
+                    <compilerArgs>
+                        <arg>-AlegacyConfigRoot=true</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
         </plugins>
diff --git a/quarkus/extensions/kogito-quarkus-decisions-extension/kogito-quarkus-decisions/pom.xml b/quarkus/extensions/kogito-quarkus-decisions-extension/kogito-quarkus-decisions/pom.xml
index 14bdfbb77cc..75bde690f0b 100644
--- a/quarkus/extensions/kogito-quarkus-decisions-extension/kogito-quarkus-decisions/pom.xml
+++ b/quarkus/extensions/kogito-quarkus-decisions-extension/kogito-quarkus-decisions/pom.xml
@@ -123,6 +123,9 @@
                             <version>${version.io.quarkus}</version>
                         </path>
                     </annotationProcessorPaths>
+                    <compilerArgs>
+                        <arg>-AlegacyConfigRoot=true</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
             <plugin>
diff --git a/quarkus/extensions/kogito-quarkus-extension-common/kogito-quarkus-common/src/main/java/org/kie/kogito/quarkus/registry/ProcessDefinitionRegistration.java b/quarkus/extensions/kogito-quarkus-extension-common/kogito-quarkus-common/src/main/java/org/kie/kogito/quarkus/registry/ProcessDefinitionRegistration.java
index ea98fc99ba9..56ce82e0ede 100644
--- a/quarkus/extensions/kogito-quarkus-extension-common/kogito-quarkus-common/src/main/java/org/kie/kogito/quarkus/registry/ProcessDefinitionRegistration.java
+++ b/quarkus/extensions/kogito-quarkus-extension-common/kogito-quarkus-common/src/main/java/org/kie/kogito/quarkus/registry/ProcessDefinitionRegistration.java
@@ -38,7 +38,6 @@
 public class ProcessDefinitionRegistration {
 
     Instance<Processes> processes;
-    Instance<Application> application;
     ProcessDefinitionEventRegistry processDefinitionRegistry;
 
     @Inject
diff --git a/quarkus/extensions/kogito-quarkus-extension/kogito-quarkus-deployment/pom.xml b/quarkus/extensions/kogito-quarkus-extension/kogito-quarkus-deployment/pom.xml
index 8d524df2b23..fdb9a76aa56 100644
--- a/quarkus/extensions/kogito-quarkus-extension/kogito-quarkus-deployment/pom.xml
+++ b/quarkus/extensions/kogito-quarkus-extension/kogito-quarkus-deployment/pom.xml
@@ -95,6 +95,9 @@
               <version>${version.io.quarkus}</version>
             </path>
           </annotationProcessorPaths>
+          <compilerArgs>
+            <arg>-AlegacyConfigRoot=true</arg>
+          </compilerArgs>
         </configuration>
       </plugin>
     </plugins>
diff --git a/quarkus/extensions/kogito-quarkus-extension/kogito-quarkus/pom.xml b/quarkus/extensions/kogito-quarkus-extension/kogito-quarkus/pom.xml
index 60e22aff45e..7b8669038f0 100644
--- a/quarkus/extensions/kogito-quarkus-extension/kogito-quarkus/pom.xml
+++ b/quarkus/extensions/kogito-quarkus-extension/kogito-quarkus/pom.xml
@@ -99,6 +99,9 @@
               <version>${version.io.quarkus}</version>
             </path>
           </annotationProcessorPaths>
+          <compilerArgs>
+            <arg>-AlegacyConfigRoot=true</arg>
+          </compilerArgs>
         </configuration>
       </plugin>
     </plugins>
diff --git a/quarkus/extensions/kogito-quarkus-processes-extension/kogito-quarkus-processes/pom.xml b/quarkus/extensions/kogito-quarkus-processes-extension/kogito-quarkus-processes/pom.xml
index c93fe7c1cd3..94220228ad4 100644
--- a/quarkus/extensions/kogito-quarkus-processes-extension/kogito-quarkus-processes/pom.xml
+++ b/quarkus/extensions/kogito-quarkus-processes-extension/kogito-quarkus-processes/pom.xml
@@ -94,6 +94,9 @@
               <version>${version.io.quarkus}</version>
             </path>
           </annotationProcessorPaths>
+          <compilerArgs>
+            <arg>-AlegacyConfigRoot=true</arg>
+          </compilerArgs>
         </configuration>
       </plugin>
     </plugins>