diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 249e5832..c1962a79 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index fae08049..4eaec467 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index a69d9cb6..aeb74cbb 100755
--- a/gradlew
+++ b/gradlew
@@ -55,7 +55,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,13 +80,10 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -143,12 +140,16 @@ fi
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -193,6 +194,10 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
 # Collect all arguments for the java command;
 #   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
 #     shell script including quotes and variable substitutions, so put them in
diff --git a/gradlew.bat b/gradlew.bat
index f127cfd4..93e3f59f 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -26,6 +26,7 @@ if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
diff --git a/src/main/java/me/itzg/helpers/curseforge/CurseForgeInstaller.java b/src/main/java/me/itzg/helpers/curseforge/CurseForgeInstaller.java
index d776f77f..1ed40d2b 100644
--- a/src/main/java/me/itzg/helpers/curseforge/CurseForgeInstaller.java
+++ b/src/main/java/me/itzg/helpers/curseforge/CurseForgeInstaller.java
@@ -728,11 +728,6 @@ private Mono<PathWithInfo> processFile(InstallContext context, OutputSubdirResol
                     outputResult.isWorld(),
                     outputResult.getDir()
                 )
-            )
-            .switchIfEmpty(Mono.error(() -> new GenericException(
-                String.format("Unable to determine output location for file '%s' in '%s'",
-                    cfFile.getDisplayName(), modInfo.getName()
-                )))
             );
     }
 
diff --git a/src/main/java/me/itzg/helpers/curseforge/OutputSubdirResolver.java b/src/main/java/me/itzg/helpers/curseforge/OutputSubdirResolver.java
index 128b388c..878b39c8 100644
--- a/src/main/java/me/itzg/helpers/curseforge/OutputSubdirResolver.java
+++ b/src/main/java/me/itzg/helpers/curseforge/OutputSubdirResolver.java
@@ -1,20 +1,18 @@
 package me.itzg.helpers.curseforge;
 
 import java.nio.file.Path;
-import java.util.concurrent.ConcurrentHashMap;
 import lombok.Data;
+import lombok.extern.slf4j.Slf4j;
 import me.itzg.helpers.curseforge.model.Category;
 import me.itzg.helpers.curseforge.model.CurseForgeMod;
-import me.itzg.helpers.errors.GenericException;
 import me.itzg.helpers.files.ReactiveFileUtils;
 import org.jetbrains.annotations.NotNull;
 import reactor.core.publisher.Mono;
 
+@Slf4j
 public class OutputSubdirResolver {
 
     private final CategoryInfo categoryInfo;
-    private final ConcurrentHashMap<String, Mono<Path>> subDirs
-        = new ConcurrentHashMap<>();
     private final OutputPaths outputPaths;
 
     public OutputSubdirResolver(Path outputDir, CategoryInfo categoryInfo) {
@@ -41,6 +39,9 @@ public Mono<Result> resolve(CurseForgeMod modInfo) {
         final Category category = categoryInfo.contentClassIds.get(modInfo.getClassId());
         // applicable category?
         if (category == null) {
+            log.debug("Skipping output of project file '{}' (id={}) with class ID {}",
+                modInfo.getName(), modInfo.getId(), modInfo.getClassId()
+                );
             return Mono.empty();
         }
 
@@ -55,10 +56,7 @@ else if (category.getSlug().equals("worlds")) {
             subDirMono = outputPaths.getWorldsDir();
         }
         else {
-            return Mono.error(
-                new GenericException(
-                    String.format("Unsupported category type=%s from mod=%s", category.getSlug(), modInfo.getSlug()))
-            );
+            return Mono.empty();
         }
 
         return subDirMono