diff --git a/snapcraft/extensions/kde_neon_6.py b/snapcraft/extensions/kde_neon_6.py
index 0588dadca1..4c63115240 100644
--- a/snapcraft/extensions/kde_neon_6.py
+++ b/snapcraft/extensions/kde_neon_6.py
@@ -22,6 +22,7 @@
 import re
 from typing import Any
 
+from craft_application.errors import CraftValidationError
 from overrides import overrides
 
 from .extension import Extension, get_extensions_data_dir, prepend_to_env
@@ -189,6 +190,9 @@ def get_root_snippet(self) -> dict[str, Any]:
         content_kf6_snap = self.kde_snaps.content_kf6 + "-all"
         gpu_plugs = self.kde_snaps.gpu_plugs
         gpu_layouts = self.kde_snaps.gpu_layouts
+        if not (base := self.yaml_data.get("base")):
+            raise CraftValidationError("The 'base' key is required.")
+        lxqt_support_snap = f"lxqt-support-{base}"
 
         return {
             "assumes": ["snapd2.58.3"],  # for cups support
@@ -221,12 +225,26 @@ def get_root_snippet(self) -> dict[str, Any]:
                     "default-provider": platform_kf6_snap,
                     "target": "$SNAP/kf6",
                 },
+                lxqt_support_snap: {
+                    "content": lxqt_support_snap,
+                    "interface": "content",
+                    "target": f"$SNAP/{lxqt_support_snap}",
+                    "default-provider": lxqt_support_snap,
+                },
                 **gpu_plugs,
             },
             "environment": {
                 "SNAP_DESKTOP_RUNTIME": "$SNAP/kf6",
                 "GTK_USE_PORTAL": "1",
                 "PLATFORM_PLUG": platform_kf6_snap,
+                "LD_LIBRARY_PATH": (
+                    f"$SNAP/{lxqt_support_snap}/usr/lib/"
+                    "${CRAFT_ARCH_TRIPLET_BUILD_FOR}:${LD_LIBRARY_PATH}"
+                ),
+                "QT_PLUGIN_PATH": (
+                    f"$SNAP/{lxqt_support_snap}/usr/lib/"
+                    "${CRAFT_ARCH_TRIPLET_BUILD_FOR}/qt6/plugins:${QT_PLUGIN_PATH}"
+                ),
             },
             "hooks": {
                 "configure": {
@@ -237,6 +255,12 @@ def get_root_snippet(self) -> dict[str, Any]:
             "layout": {
                 "/usr/share/X11": {"symlink": "$SNAP/kf6/usr/share/X11"},
                 "/usr/share/qt6": {"symlink": "$SNAP/kf6/usr/share/qt6"},
+                "/usr/share/color-schemes": {
+                    "symlink": f"$SNAP/{lxqt_support_snap}/usr/share/color-schemes"
+                },
+                "/usr/share/Kvantum": {
+                    "symlink": f"$SNAP/{lxqt_support_snap}/usr/share/Kvantum"
+                },
                 **gpu_layouts,
             },
         }
diff --git a/tests/spread/extensions/kde-neon-6-core24/task.yaml b/tests/spread/extensions/kde-neon-6-core24/task.yaml
index 0a61d9fe7f..109e40a236 100644
--- a/tests/spread/extensions/kde-neon-6-core24/task.yaml
+++ b/tests/spread/extensions/kde-neon-6-core24/task.yaml
@@ -44,6 +44,7 @@ execute: |
   # Verify content snap was installed for dependency checks.
   snap list gtk-common-themes
   snap list kf6-core24
+  snap list lxqt-support-core24
 
   # Verify all dependencies were found.
   if echo "$output" | grep -q "part is missing libraries"; then
diff --git a/tests/spread/extensions/kde-neon-6/task.yaml b/tests/spread/extensions/kde-neon-6/task.yaml
index 812927981d..11f4eaf73f 100644
--- a/tests/spread/extensions/kde-neon-6/task.yaml
+++ b/tests/spread/extensions/kde-neon-6/task.yaml
@@ -44,6 +44,7 @@ execute: |
   # Verify content snap was installed for dependency checks.
   snap list gtk-common-themes
   snap list kf6-core22
+  snap list lxqt-support-core22
 
   # Verify all dependencies were found.
   if echo "$output" | grep -q "part is missing libraries"; then
diff --git a/tests/unit/extensions/test_kde_neon_6.py b/tests/unit/extensions/test_kde_neon_6.py
index 95252ae707..3e4fbef21a 100644
--- a/tests/unit/extensions/test_kde_neon_6.py
+++ b/tests/unit/extensions/test_kde_neon_6.py
@@ -177,6 +177,8 @@ def test_get_root_snippet(kde_neon_6_extension):
             "SNAP_DESKTOP_RUNTIME": "$SNAP/kf6",
             "GTK_USE_PORTAL": "1",
             "PLATFORM_PLUG": "kf6-core22",
+            "LD_LIBRARY_PATH": "$SNAP/lxqt-support-core22/usr/lib/${CRAFT_ARCH_TRIPLET_BUILD_FOR}:${LD_LIBRARY_PATH}",
+            "QT_PLUGIN_PATH": "$SNAP/lxqt-support-core22/usr/lib/${CRAFT_ARCH_TRIPLET_BUILD_FOR}/qt6/plugins:${QT_PLUGIN_PATH}",
         },
         "hooks": {
             "configure": {
@@ -188,6 +190,12 @@ def test_get_root_snippet(kde_neon_6_extension):
             "/usr/share/X11": {"symlink": "$SNAP/kf6/usr/share/X11"},
             "/usr/share/qt6": {"symlink": "$SNAP/kf6/usr/share/qt6"},
             "/usr/share/libdrm": {"bind": "$SNAP/kf6-core22/usr/share/libdrm"},
+            "/usr/share/Kvantum": {
+                "symlink": "$SNAP/lxqt-support-core22/usr/share/Kvantum"
+            },
+            "/usr/share/color-schemes": {
+                "symlink": "$SNAP/lxqt-support-core22/usr/share/color-schemes"
+            },
         },
         "plugs": {
             "desktop": {"mount-host-font-cache": False},
@@ -217,6 +225,12 @@ def test_get_root_snippet(kde_neon_6_extension):
                 "default-provider": "kf6-core22",
                 "target": "$SNAP/kf6",
             },
+            "lxqt-support-core22": {
+                "content": "lxqt-support-core22",
+                "interface": "content",
+                "default-provider": "lxqt-support-core22",
+                "target": "$SNAP/lxqt-support-core22",
+            },
         },
     }
 
@@ -229,6 +243,8 @@ def test_get_root_snippet_core24(kde_neon_6_extension_core24):
             "SNAP_DESKTOP_RUNTIME": "$SNAP/kf6",
             "GTK_USE_PORTAL": "1",
             "PLATFORM_PLUG": "kf6-core24",
+            "LD_LIBRARY_PATH": "$SNAP/lxqt-support-core24/usr/lib/${CRAFT_ARCH_TRIPLET_BUILD_FOR}:${LD_LIBRARY_PATH}",
+            "QT_PLUGIN_PATH": "$SNAP/lxqt-support-core24/usr/lib/${CRAFT_ARCH_TRIPLET_BUILD_FOR}/qt6/plugins:${QT_PLUGIN_PATH}",
         },
         "hooks": {
             "configure": {
@@ -241,6 +257,12 @@ def test_get_root_snippet_core24(kde_neon_6_extension_core24):
             "/usr/share/qt6": {"symlink": "$SNAP/kf6/usr/share/qt6"},
             "/usr/share/libdrm": {"bind": "$SNAP/gpu-2404/libdrm"},
             "/usr/share/drirc.d": {"symlink": "$SNAP/gpu-2404/drirc.d"},
+            "/usr/share/Kvantum": {
+                "symlink": "$SNAP/lxqt-support-core24/usr/share/Kvantum"
+            },
+            "/usr/share/color-schemes": {
+                "symlink": "$SNAP/lxqt-support-core24/usr/share/color-schemes"
+            },
         },
         "plugs": {
             "desktop": {"mount-host-font-cache": False},
@@ -275,6 +297,12 @@ def test_get_root_snippet_core24(kde_neon_6_extension_core24):
                 "interface": "content",
                 "target": "$SNAP/gpu-2404",
             },
+            "lxqt-support-core24": {
+                "content": "lxqt-support-core24",
+                "interface": "content",
+                "default-provider": "lxqt-support-core24",
+                "target": "$SNAP/lxqt-support-core24",
+            },
         },
     }
 
@@ -314,6 +342,8 @@ def test_get_root_snippet_with_external_sdk(kde_neon_6_extension_with_build_snap
             "SNAP_DESKTOP_RUNTIME": "$SNAP/kf6",
             "GTK_USE_PORTAL": "1",
             "PLATFORM_PLUG": "kf6-core22",
+            "LD_LIBRARY_PATH": "$SNAP/lxqt-support-core22/usr/lib/${CRAFT_ARCH_TRIPLET_BUILD_FOR}:${LD_LIBRARY_PATH}",
+            "QT_PLUGIN_PATH": "$SNAP/lxqt-support-core22/usr/lib/${CRAFT_ARCH_TRIPLET_BUILD_FOR}/qt6/plugins:${QT_PLUGIN_PATH}",
         },
         "hooks": {
             "configure": {
@@ -325,6 +355,12 @@ def test_get_root_snippet_with_external_sdk(kde_neon_6_extension_with_build_snap
             "/usr/share/X11": {"symlink": "$SNAP/kf6/usr/share/X11"},
             "/usr/share/qt6": {"symlink": "$SNAP/kf6/usr/share/qt6"},
             "/usr/share/libdrm": {"bind": "$SNAP/kf6-core22/usr/share/libdrm"},
+            "/usr/share/Kvantum": {
+                "symlink": "$SNAP/lxqt-support-core22/usr/share/Kvantum"
+            },
+            "/usr/share/color-schemes": {
+                "symlink": "$SNAP/lxqt-support-core22/usr/share/color-schemes"
+            },
         },
         "plugs": {
             "desktop": {"mount-host-font-cache": False},
@@ -354,6 +390,12 @@ def test_get_root_snippet_with_external_sdk(kde_neon_6_extension_with_build_snap
                 "default-provider": "kf6-core22",
                 "target": "$SNAP/kf6",
             },
+            "lxqt-support-core22": {
+                "content": "lxqt-support-core22",
+                "interface": "content",
+                "default-provider": "lxqt-support-core22",
+                "target": "$SNAP/lxqt-support-core22",
+            },
         },
     }
 
@@ -368,6 +410,8 @@ def test_get_root_snippet_with_external_sdk_core24(
             "SNAP_DESKTOP_RUNTIME": "$SNAP/kf6",
             "GTK_USE_PORTAL": "1",
             "PLATFORM_PLUG": "kf6-core24",
+            "LD_LIBRARY_PATH": "$SNAP/lxqt-support-core24/usr/lib/${CRAFT_ARCH_TRIPLET_BUILD_FOR}:${LD_LIBRARY_PATH}",
+            "QT_PLUGIN_PATH": "$SNAP/lxqt-support-core24/usr/lib/${CRAFT_ARCH_TRIPLET_BUILD_FOR}/qt6/plugins:${QT_PLUGIN_PATH}",
         },
         "hooks": {
             "configure": {
@@ -380,6 +424,12 @@ def test_get_root_snippet_with_external_sdk_core24(
             "/usr/share/qt6": {"symlink": "$SNAP/kf6/usr/share/qt6"},
             "/usr/share/libdrm": {"bind": "$SNAP/gpu-2404/libdrm"},
             "/usr/share/drirc.d": {"symlink": "$SNAP/gpu-2404/drirc.d"},
+            "/usr/share/Kvantum": {
+                "symlink": "$SNAP/lxqt-support-core24/usr/share/Kvantum"
+            },
+            "/usr/share/color-schemes": {
+                "symlink": "$SNAP/lxqt-support-core24/usr/share/color-schemes"
+            },
         },
         "plugs": {
             "desktop": {"mount-host-font-cache": False},
@@ -414,6 +464,12 @@ def test_get_root_snippet_with_external_sdk_core24(
                 "interface": "content",
                 "target": "$SNAP/gpu-2404",
             },
+            "lxqt-support-core24": {
+                "content": "lxqt-support-core24",
+                "interface": "content",
+                "default-provider": "lxqt-support-core24",
+                "target": "$SNAP/lxqt-support-core24",
+            },
         },
     }