diff --git a/core/src/main/java/io/xpipe/core/process/ShellDumbMode.java b/core/src/main/java/io/xpipe/core/process/ShellDumbMode.java
index 20573ed72..3faa460c2 100644
--- a/core/src/main/java/io/xpipe/core/process/ShellDumbMode.java
+++ b/core/src/main/java/io/xpipe/core/process/ShellDumbMode.java
@@ -8,6 +8,8 @@ public interface ShellDumbMode {
         return true;
     }
 
+    default void throwIfUnsupported() {}
+
     default ShellDialect getSwitchDialect() {
         return null;
     }
@@ -25,6 +27,14 @@ public interface ShellDumbMode {
 
     class Unsupported implements ShellDumbMode {
 
+        private final String message;
+
+        public Unsupported(String message) {this.message = message;}
+
+        public void throwIfUnsupported() {
+            throw new UnsupportedOperationException(message);
+        }
+
         @Override
         public boolean supportsAnyPossibleInteraction() {
             return false;
diff --git a/core/src/main/java/io/xpipe/core/store/ConnectionFileSystem.java b/core/src/main/java/io/xpipe/core/store/ConnectionFileSystem.java
index 22f0f42a3..c5331bbc9 100644
--- a/core/src/main/java/io/xpipe/core/store/ConnectionFileSystem.java
+++ b/core/src/main/java/io/xpipe/core/store/ConnectionFileSystem.java
@@ -1,9 +1,8 @@
 package io.xpipe.core.store;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import io.xpipe.core.process.CommandBuilder;
 import io.xpipe.core.process.ShellControl;
-
-import com.fasterxml.jackson.annotation.JsonIgnore;
 import lombok.Getter;
 
 import java.io.InputStream;
@@ -37,9 +36,10 @@ public class ConnectionFileSystem implements FileSystem {
     @Override
     public FileSystem open() throws Exception {
         shellControl.start();
-        if (!shellControl.getShellDialect().getDumbMode().supportsAnyPossibleInteraction()) {
+        var d = shellControl.getShellDialect().getDumbMode();
+        if (!d.supportsAnyPossibleInteraction()) {
             shellControl.close();
-            throw new UnsupportedOperationException("System shell does not support file system interaction");
+            d.throwIfUnsupported();
         }
         return this;
     }