diff --git a/devtools/gradle/gradle-extension-plugin/src/main/java/io/quarkus/extension/gradle/tasks/ExtensionDescriptorTask.java b/devtools/gradle/gradle-extension-plugin/src/main/java/io/quarkus/extension/gradle/tasks/ExtensionDescriptorTask.java
index d3165cb922fc1..06acf5041ec29 100644
--- a/devtools/gradle/gradle-extension-plugin/src/main/java/io/quarkus/extension/gradle/tasks/ExtensionDescriptorTask.java
+++ b/devtools/gradle/gradle-extension-plugin/src/main/java/io/quarkus/extension/gradle/tasks/ExtensionDescriptorTask.java
@@ -311,7 +311,7 @@ private void computeArtifactCoords(ObjectNode extObject) {
     }
 
     private void computeSourceLocation(ObjectNode extObject) {
-        Map<String, String> repo = ScmInfoProvider.getSourceRepo(null);
+        Map<String, String> repo = new ScmInfoProvider(null).getSourceRepo();
         if (repo != null) {
             ObjectNode metadata = getMetadataNode(extObject);
 
diff --git a/independent-projects/extension-maven-plugin/src/main/java/io/quarkus/maven/ExtensionDescriptorMojo.java b/independent-projects/extension-maven-plugin/src/main/java/io/quarkus/maven/ExtensionDescriptorMojo.java
index 20bbdd7883d01..bcde8aacfae7e 100644
--- a/independent-projects/extension-maven-plugin/src/main/java/io/quarkus/maven/ExtensionDescriptorMojo.java
+++ b/independent-projects/extension-maven-plugin/src/main/java/io/quarkus/maven/ExtensionDescriptorMojo.java
@@ -682,9 +682,11 @@ private void addSource(ObjectNode extObject) throws MojoExecutionException {
         Scm scm = getScm();
         String scmUrl = scm != null ? scm.getUrl() : null;
 
-        Map<String, String> repo = new ScmInfoProvider().getSourceRepo(scmUrl);
+        ScmInfoProvider scmInfoProvider = new ScmInfoProvider(scmUrl);
+        Map<String, String> repo = scmInfoProvider.getSourceRepo();
+        ObjectNode metadata = getMetadataNode(extObject);
+
         if (repo != null) {
-            ObjectNode metadata = getMetadataNode(extObject);
             for (Map.Entry<String, String> e : repo.entrySet()) {
                 // Ignore if already set
                 String value = e.getValue();
@@ -695,6 +697,16 @@ private void addSource(ObjectNode extObject) throws MojoExecutionException {
                 }
 
             }
+
+            String warning = scmInfoProvider.getInconsistencyWarning();
+            if (warning != null) {
+                getLog().warn(warning);
+            }
+        }
+        // We had been generic, but go a bit more specific so we can give a sensible message
+        else if (!metadata.has("scm-url")) {
+            getLog().debug(
+                    "Could not work out a source control repository from the build environment or build file. Consider adding an scm-url entry in quarkus-extension.yaml");
         }
     }
 
@@ -708,7 +720,7 @@ private Scm getScm() {
 
         if (localProject == null) {
             final Log log = getLog();
-            log.warn("Workspace provider could not resolve local project for " + artifact.getGroupId() + ":"
+            log.debug("Workspace provider could not resolve local project for " + artifact.getGroupId() + ":"
                     + artifact.getArtifactId());
         }
 
@@ -716,6 +728,7 @@ private Scm getScm() {
             scm = localProject.getRawModel().getScm();
             localProject = localProject.getLocalParent();
         }
+
         return scm;
 
     }
diff --git a/independent-projects/tools/devtools-common/src/main/java/io/quarkus/devtools/project/extensions/ScmInfoProvider.java b/independent-projects/tools/devtools-common/src/main/java/io/quarkus/devtools/project/extensions/ScmInfoProvider.java
index ce3eaf10c546c..5cb6ad8af6583 100644
--- a/independent-projects/tools/devtools-common/src/main/java/io/quarkus/devtools/project/extensions/ScmInfoProvider.java
+++ b/independent-projects/tools/devtools-common/src/main/java/io/quarkus/devtools/project/extensions/ScmInfoProvider.java
@@ -5,23 +5,47 @@
 
 public class ScmInfoProvider {
 
-    public static Map<String, String> getSourceRepo(String valueFromBuildFile) {
+    private final String valueFromBuildFile;
+    private final String valueFromEnvironment;
+
+    public ScmInfoProvider(String valueFromBuildFile) {
+        this.valueFromBuildFile = valueFromBuildFile;
         // We could try and parse the .git/config file, but that will be fragile
         // We could use JGit, something like https://wiki.eclipse.org/JGit/User_Guide#Repository but it seems a lot for our needs
         String repo = System.getenv("GITHUB_REPOSITORY");
-        Map info = null;
         if (repo != null) {
-            info = new HashMap();
             String qualifiedRepo = "https://github.com/" + repo;
             // Don't try and guess where slashes will be, just deal with any double slashes by brute force
-            qualifiedRepo = qualifiedRepo.replace("github.com//", "github.com/");
-            info.put("url", qualifiedRepo);
+            this.valueFromEnvironment = qualifiedRepo.replace("github.com//", "github.com/");
+        } else {
+            this.valueFromEnvironment = null;
+        }
+    }
+
+    public Map<String, String> getSourceRepo() {
+        // We use a map here because we might also add things like github tags
+        Map<String, String> info = null;
+        if (valueFromEnvironment != null) {
+            info = new HashMap<>();
+            info.put("url", valueFromEnvironment);
 
         } else if (valueFromBuildFile != null) {
-            info = new HashMap();
+            info = new HashMap<>();
             info.put("url", valueFromBuildFile);
         }
+
         return info;
     }
 
+    public String getInconsistencyWarning() {
+        if (valueFromEnvironment != null && valueFromBuildFile != null && !valueFromEnvironment.equals(valueFromBuildFile)) {
+            return "The scm-url coordinates in the build file, " + valueFromBuildFile
+                    + " did not match the repository configured in the GITHUB_REPOSITORY environment variable, "
+                    + valueFromEnvironment
+                    + ". The value which will be used for the extension metadata is "
+                    + valueFromEnvironment + ".";
+        } else {
+            return null;
+        }
+    }
 }
diff --git a/independent-projects/tools/devtools-common/src/test/java/io/quarkus/devtools/project/extensions/ScmInfoProviderTest.java b/independent-projects/tools/devtools-common/src/test/java/io/quarkus/devtools/project/extensions/ScmInfoProviderTest.java
index 4bd6415c03f60..9672e6f90f742 100644
--- a/independent-projects/tools/devtools-common/src/test/java/io/quarkus/devtools/project/extensions/ScmInfoProviderTest.java
+++ b/independent-projects/tools/devtools-common/src/test/java/io/quarkus/devtools/project/extensions/ScmInfoProviderTest.java
@@ -1,9 +1,9 @@
 package io.quarkus.devtools.project.extensions;
 
-import static io.quarkus.devtools.project.extensions.ScmInfoProvider.getSourceRepo;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.Map;
 
@@ -28,7 +28,7 @@ public void setUp() {
 
     @Test
     public void shouldReturnNullWhenNoEnvironmentOrBuildConfigIsPresent() {
-        Map scm = getSourceRepo(null);
+        Map<String, String> scm = new ScmInfoProvider(null).getSourceRepo();
         // We shouldn't throw an exception or get upset, we should just quietly return null
         assertNull(scm);
     }
@@ -38,18 +38,39 @@ public void shouldReturnNullWhenNoEnvironmentOrBuildConfigIsPresent() {
     void testGetSourceControlCoordinatesWhenOnlyEnvironmentIsSet() {
         String repoName = "org/place";
         environment.set("GITHUB_REPOSITORY", repoName);
-        Map repo = getSourceRepo(null);
+        Map<String, String> repo = new ScmInfoProvider(null).getSourceRepo();
         assertNotNull(repo);
-        assertEquals(repo.get("url").toString(), "https://github.com/org/place");
+        assertEquals(repo.get("url"), "https://github.com/org/place");
+    }
+
+    void testGetWarningWhenOnlyEnvironmentIsSet() {
+        String repoName = "org/place";
+        environment.set("GITHUB_REPOSITORY", repoName);
+        String warning = new ScmInfoProvider(null).getInconsistencyWarning();
+        assertNull(warning);
     }
 
     // Easy case - we just read the info from the pom
     @Test
     void testGetSourceControlCoordinatesWhenOnlyPomIsSet() {
         final String scmUrl = "https://github.com/org/frompom";
-        Map repo = getSourceRepo(scmUrl);
+        Map<String, String> repo = new ScmInfoProvider(scmUrl).getSourceRepo();
         assertNotNull(repo);
-        assertEquals(repo.get("url").toString(), scmUrl);
+        assertEquals(repo.get("url"), scmUrl);
+    }
+
+    void testGetWarningWhenOnlyPomIsSet() {
+        final String scmUrl = "https://github.com/org/frompom";
+        String warning = new ScmInfoProvider(scmUrl).getInconsistencyWarning();
+        assertNull(warning);
+    }
+
+    void testGetWarningWhenEnvironmentAndPomAgree() {
+        final String scmUrl = "https://github.com/org/place";
+        String repoName = "org/place";
+        environment.set("GITHUB_REPOSITORY", repoName);
+        String warning = new ScmInfoProvider(scmUrl).getInconsistencyWarning();
+        assertNull(warning);
     }
 
     // Case where the pom info conflicts with the environment info; honour the environment info
@@ -57,10 +78,20 @@ void testGetSourceControlCoordinatesWhenEnvironmentAndPomDisagree() {
         final String scmUrl = "https://github.com/org/frompom";
         String repoName = "org/place";
         environment.set("GITHUB_REPOSITORY", repoName);
-        Map repo = getSourceRepo(null);
+        Map<String, String> repo = new ScmInfoProvider(null).getSourceRepo();
         assertNotNull(repo);
         // We should honour the environment info; out of the box, all quarkiverse extensions generated by the quarkus tooling will report a scm url of quarkiverse-parent/<project-name> in their model
-        assertEquals(repo.get("url").toString(), "https://github.com/org/place");
+        assertEquals(repo.get("url"), "https://github.com/org/place");
+    }
+
+    void testGetWarningWhenEnvironmentAndPomDisagree() {
+        final String scmUrl = "https://github.com/org/frompom";
+        String repoName = "org/place";
+        environment.set("GITHUB_REPOSITORY", repoName);
+        String warning = new ScmInfoProvider(scmUrl).getInconsistencyWarning();
+        assertNotNull(warning);
+        assertTrue(warning.contains(scmUrl), warning);
+        assertTrue(warning.contains(repoName), warning);
     }
 
 }