diff --git a/VERSION.txt b/VERSION.txt
index 3a4036f..53a75d6 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-0.2.5
+0.2.6
diff --git a/pyproject.toml b/pyproject.toml
index 8c56ea8..b9d16ca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,6 +9,7 @@ authors = [{ name = "Flipper Devices Inc.", email = "pypi@flipperdevices.com" }]
 description = "uFBT - micro Flipper Build Tool. Tool for building and developing applications (.fap) for Flipper Zero and its device family."
 readme = "README.md"
 requires-python = ">=3.8"
+dependencies = ["oslex>=0.1.3"]
 keywords = ["ufbt", "flipperzero", "fbt", "stm32", "fap"]
 license = { text = "GPL-3.0" }
 classifiers = [
@@ -26,7 +27,6 @@ classifiers = [
     "Operating System :: POSIX :: Linux",
 ]
 
-
 [project.urls]
 homepage = "https://github.com/flipperdevices/flipperzero-ufbt"
 documentation = "https://github.com/flipperdevices/flipperzero-ufbt"
diff --git a/ufbt/__init__.py b/ufbt/__init__.py
index f066a2e..3ed8187 100644
--- a/ufbt/__init__.py
+++ b/ufbt/__init__.py
@@ -21,6 +21,7 @@
 import pathlib
 import platform
 import sys
+import oslex
 
 from .bootstrap import (
     DEFAULT_UFBT_HOME,
@@ -83,10 +84,13 @@ def ufbt_cli():
     if not os.path.exists(ufbt_state_dir / "current"):
         bootstrap_cli(["update"])
 
-    if not (ufbt_state_dir / "current" / "scripts" / "ufbt").exists():
+    if not (
+        ufbt_script_root := ufbt_state_dir / "current" / "scripts" / "ufbt"
+    ).exists():
         print("SDK is missing scripts distribution!")
         print("You might be trying to use an SDK in an outdated format.")
-        print("Run `ufbt update -h` for more information on how to update.")
+        print("You can clean up current state with `ufbt clean --purge`.")
+        print("Run `ufbt update -h` for more information on SDK installation.")
         return 1
 
     UFBT_APP_DIR = os.getcwd()
@@ -94,18 +98,23 @@ def ufbt_cli():
     if platform.system() == "Windows":
         commandline = (
             r'call "%UFBT_STATE_DIR%/current/scripts/toolchain/fbtenv.cmd" env & '
-            "python -m SCons -Q --warn=target-not-built "
-            r'-C "%UFBT_STATE_DIR%/current/scripts/ufbt" '
-            f'"UFBT_APP_DIR={UFBT_APP_DIR}" ' + " ".join(sys.argv[1:])
         )
-
     else:
-        commandline = (
-            '. "$UFBT_STATE_DIR/current/scripts/toolchain/fbtenv.sh" && '
-            "python3 -m SCons -Q --warn=target-not-built "
-            '-C "$UFBT_STATE_DIR/current/scripts/ufbt" '
-            f'"UFBT_APP_DIR={UFBT_APP_DIR}" ' + " ".join(sys.argv[1:])
-        )
+        commandline = '. "$UFBT_STATE_DIR/current/scripts/toolchain/fbtenv.sh" && '
+
+    commandline += oslex.join(
+        [
+            "python3",
+            "-m",
+            "SCons",
+            "-Q",
+            "--warn=target-not-built",
+            "-C",
+            str(ufbt_script_root),
+            f"UFBT_APP_DIR={UFBT_APP_DIR}",
+            *sys.argv[1:],
+        ]
+    )
 
     # print(commandline)
     retcode = os.system(commandline)