diff --git a/sbt-coursier/src/main/scala/coursier/Tasks.scala b/sbt-coursier/src/main/scala/coursier/Tasks.scala
index da58bafb8..52e47cec2 100644
--- a/sbt-coursier/src/main/scala/coursier/Tasks.scala
+++ b/sbt-coursier/src/main/scala/coursier/Tasks.scala
@@ -64,23 +64,25 @@ object Tasks {
   }
 
   def coursierRecursiveResolversTask: Def.Initialize[sbt.Task[Seq[Resolver]]] =
-    (
-      sbt.Keys.state,
-      sbt.Keys.thisProjectRef
-    ).flatMap { (state, projectRef) =>
+    Def.taskDyn {
+
+      val state = sbt.Keys.state.value
+      val projectRef = sbt.Keys.thisProjectRef.value
 
       val projects = allRecursiveInterDependencies(state, projectRef)
 
-      coursierResolvers
+      val t = coursierResolvers
         .forAllProjects(state, projectRef +: projects)
         .map(_.values.toVector.flatten)
+
+      Def.task(t.value)
     }
 
   def coursierFallbackDependenciesTask: Def.Initialize[sbt.Task[Seq[(Module, String, URL, Boolean)]]] =
-    (
-      sbt.Keys.state,
-      sbt.Keys.thisProjectRef
-    ).flatMap { (state, projectRef) =>
+    Def.taskDyn {
+
+      val state = sbt.Keys.state.value
+      val projectRef = sbt.Keys.thisProjectRef.value
 
       val projects = allRecursiveInterDependencies(state, projectRef)
 
@@ -88,9 +90,8 @@ object Tasks {
         .forAllProjects(state, projectRef +: projects)
         .map(_.values.toVector.flatten)
 
-      for {
-        allDependencies <- allDependenciesTask
-      } yield {
+      Def.task {
+        val allDependencies = allDependenciesTask.value
 
         FromSbt.fallbackDependencies(
           allDependencies,
@@ -101,10 +102,10 @@ object Tasks {
     }
 
   def coursierProjectTask: Def.Initialize[sbt.Task[Project]] =
-    (
-      sbt.Keys.state,
-      sbt.Keys.thisProjectRef
-    ).flatMap { (state, projectRef) =>
+    Def.taskDyn {
+
+      val state = sbt.Keys.state.value
+      val projectRef = sbt.Keys.thisProjectRef.value
 
       // should projectID.configurations be used instead?
       val configurations = ivyConfigurations.in(projectRef).get(state)
@@ -140,9 +141,9 @@ object Tasks {
         res
       }
 
-      for {
-        allDependencies <- allDependenciesTask
-      } yield {
+      Def.task {
+
+        val allDependencies = allDependenciesTask.value
 
         val configMap = configurations.map(cfg => cfg.name -> cfg.extendsConfigs.map(_.name)).toMap
 
@@ -164,14 +165,16 @@ object Tasks {
     }
 
   def coursierInterProjectDependenciesTask: Def.Initialize[sbt.Task[Seq[Project]]] =
-    (
-      sbt.Keys.state,
-      sbt.Keys.thisProjectRef
-    ).flatMap { (state, projectRef) =>
+    Def.taskDyn {
+
+      val state = sbt.Keys.state.value
+      val projectRef = sbt.Keys.thisProjectRef.value
 
       val projects = allRecursiveInterDependencies(state, projectRef)
 
-      coursierProject.forAllProjects(state, projects).map(_.values.toVector)
+      val t = coursierProject.forAllProjects(state, projects).map(_.values.toVector)
+
+      Def.task(t.value)
     }
 
   def coursierPublicationsTask(
@@ -405,8 +408,10 @@ object Tasks {
   }
 
   def parentProjectCacheTask: Def.Initialize[sbt.Task[Map[Seq[sbt.Resolver],Seq[coursier.ProjectCache]]]] =
-    (sbt.Keys.state,
-      sbt.Keys.thisProjectRef).flatMap{ (state, projectRef) =>
+    Def.taskDyn {
+
+      val state = sbt.Keys.state.value
+      val projectRef = sbt.Keys.thisProjectRef.value
 
       val projectDeps = structure(state).allProjects
         .find(_.id == projectRef.project)
@@ -415,14 +420,22 @@ object Tasks {
 
       val projects = structure(state).allProjectRefs.filter(p => projectDeps(p.project))
 
-      coursierRecursiveResolvers.forAllProjects(state, projects).flatMap{ m =>
-        coursierResolution.forAllProjects(state, m.keys.toSeq).map{ n =>
-          n.foldLeft(Map.empty[Seq[Resolver], Seq[ProjectCache]]){ case (caches, (ref, resolution)) =>
-            m.get(ref).fold(caches)(resolvers =>
-              caches.updated(resolvers, resolution.projectCache +: caches.getOrElse(resolvers, Seq.empty)))
+      val t =
+        for {
+          m <- coursierRecursiveResolvers.forAllProjects(state, projects)
+          n <- coursierResolution.forAllProjects(state, m.keys.toSeq)
+        } yield
+          n.foldLeft(Map.empty[Seq[Resolver], Seq[ProjectCache]]) {
+            case (caches, (ref, resolution)) =>
+              m.get(ref).fold(caches) { resolvers =>
+                caches.updated(
+                  resolvers,
+                  resolution.projectCache +: caches.getOrElse(resolvers, Nil)
+                )
+              }
           }
-        }
-      }
+
+      Def.task(t.value)
     }
 
   private val noOptionalFilter: Option[Dependency => Boolean] = Some(dep => !dep.optional)
diff --git a/tests/shared/src/test/scala/coursier/test/ResolutionTests.scala b/tests/shared/src/test/scala/coursier/test/ResolutionTests.scala
index 8a6458901..ebf24abf6 100644
--- a/tests/shared/src/test/scala/coursier/test/ResolutionTests.scala
+++ b/tests/shared/src/test/scala/coursier/test/ResolutionTests.scala
@@ -239,8 +239,16 @@ object ResolutionTests extends TestSuite {
           Set(dep)
         ))
 
-        // A missing POM dependency is not reported correctly. That's why the method is deprecated.
-        assert(res.errors == Seq.empty)
+        val directDependencyErrors =
+          for {
+            dep <- res.dependencies.toSeq
+            err <- res.errorCache
+              .get(dep.moduleVersion)
+              .toSeq
+          } yield (dep, err)
+
+        // Error originates from a dependency import, not directly from a dependency
+        assert(directDependencyErrors.isEmpty)
 
         // metadataErrors have that
         assert(res.metadataErrors == Seq((Module("acme", "missing-pom"), "1.0.0") -> List("Not found")))
diff --git a/web/src/main/resources/index.html b/web/src/main/resources/index.html
index a478079bd..65e7975b0 100644
--- a/web/src/main/resources/index.html
+++ b/web/src/main/resources/index.html
@@ -126,7 +126,7 @@ $('.nav-tabs a').on('shown.bs.tab', function (e) {
 </script>
 
 <script>
-  coursier.web.Main().main();
+  CoursierWeb.main();
 </script>
 
 </body>
diff --git a/web/src/main/scala/coursier/web/Main.scala b/web/src/main/scala/coursier/web/Main.scala
index f5e9e0831..2fa379284 100644
--- a/web/src/main/scala/coursier/web/Main.scala
+++ b/web/src/main/scala/coursier/web/Main.scala
@@ -1,10 +1,11 @@
 package coursier.web
 
 import japgolly.scalajs.react.React
-import scala.scalajs.js.annotation.JSExport
+
+import scala.scalajs.js.annotation.{JSExport, JSExportTopLevel}
 import org.scalajs.dom.document
 
-@JSExport
+@JSExportTopLevel("CoursierWeb")
 object Main {
   @JSExport
   def main(): Unit = {