diff --git a/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/filter/PrefixesRemoteRepositoryFilterSource.java b/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/filter/PrefixesRemoteRepositoryFilterSource.java
index 34698d310..bd7786acf 100644
--- a/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/filter/PrefixesRemoteRepositoryFilterSource.java
+++ b/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/filter/PrefixesRemoteRepositoryFilterSource.java
@@ -83,7 +83,7 @@ public final class PrefixesRemoteRepositoryFilterSource extends RemoteRepository
     private static final String CONFIG_PROPS_PREFIX =
             RemoteRepositoryFilterSourceSupport.CONFIG_PROPS_PREFIX + NAME + ".";
 
-    private static final String PREFIX_FILE_PATH = ".meta/prefixes.txt";
+    private static final String PREFIX_FILE_TYPE = ".meta/prefixes.txt";
 
     /**
      * Configuration to enable the Prefixes filter (enabled by default). Can be fine-tuned per repository using
@@ -289,7 +289,7 @@ private Path resolvePrefixesFromRemoteRepository(
             // supplier for path
             Supplier<Path> supplier = () -> {
                 MetadataRequest request =
-                        new MetadataRequest(new DefaultMetadata(PREFIX_FILE_PATH, Metadata.Nature.RELEASE_OR_SNAPSHOT));
+                        new MetadataRequest(new DefaultMetadata(PREFIX_FILE_TYPE, Metadata.Nature.RELEASE_OR_SNAPSHOT));
                 // use unique repository; this will result in prefix (repository metadata) cached under unique id
                 request.setRepository(unique);
                 request.setDeleteLocalCopyIfMissing(true);
diff --git a/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/synccontext/named/GAVNameMapper.java b/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/synccontext/named/GAVNameMapper.java
index dc21b4438..4f26137e4 100644
--- a/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/synccontext/named/GAVNameMapper.java
+++ b/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/synccontext/named/GAVNameMapper.java
@@ -87,8 +87,8 @@ public Collection<NamedLockKey> nameLocks(
         if (metadatas != null) {
             for (Metadata metadata : metadatas) {
                 keys.add(NamedLockKey.of(
-                        getMetadataName(metadata, metadataPrefix, fieldSeparator, metadataSuffix),
-                        getMetadataName(metadata, "", ":", "")));
+                        getMetadataName(metadata, fileSystemFriendly, metadataPrefix, fieldSeparator, metadataSuffix),
+                        getMetadataName(metadata, false, "", ":", "")));
             }
         }
         return keys;
@@ -106,7 +106,8 @@ private static String getArtifactName(Artifact artifact, String prefix, String s
 
     private static final String MAVEN_METADATA = "maven-metadata.xml";
 
-    private static String getMetadataName(Metadata metadata, String prefix, String separator, String suffix) {
+    private static String getMetadataName(
+            Metadata metadata, boolean fileSystemFriendly, String prefix, String separator, String suffix) {
         String name = prefix;
         if (!metadata.getGroupId().isEmpty()) {
             name += metadata.getGroupId();
@@ -117,11 +118,12 @@ private static String getMetadataName(Metadata metadata, String prefix, String s
                 }
             }
             if (!MAVEN_METADATA.equals(metadata.getType())) {
-                name += separator + PathUtils.stringToPathSegment(metadata.getType());
+                name += separator
+                        + (fileSystemFriendly ? PathUtils.stringToPathSegment(metadata.getType()) : metadata.getType());
             }
         } else {
             if (!MAVEN_METADATA.equals(metadata.getType())) {
-                name += PathUtils.stringToPathSegment(metadata.getType());
+                name += (fileSystemFriendly ? PathUtils.stringToPathSegment(metadata.getType()) : metadata.getType());
             }
         }
         return name + suffix;
diff --git a/maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/synccontext/named/BasedirHashingNameMapperTest.java b/maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/synccontext/named/BasedirHashingNameMapperTest.java
index feea3b1ea..226cc0f36 100644
--- a/maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/synccontext/named/BasedirHashingNameMapperTest.java
+++ b/maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/synccontext/named/BasedirHashingNameMapperTest.java
@@ -129,7 +129,7 @@ void prefixMetadata() {
         assertEquals(1, names.size());
         assertEquals(
                 names.iterator().next().name(),
-                basedir.toUri() + PS + ".locks" + PS + "520e2ba3a365db8cd804bcc40df38e1a52987e0f");
+                basedir.toUri() + PS + ".locks" + PS + "d7e4ca43a23278042698fe526287af16b18f8791");
     }
 
     @Test