diff --git a/cmake/modules/FindDeprecated.cmake b/cmake/modules/FindDeprecated.cmake
index eb7626e9353..1f112c9672d 100644
--- a/cmake/modules/FindDeprecated.cmake
+++ b/cmake/modules/FindDeprecated.cmake
@@ -47,7 +47,7 @@ if("XCC_USE_CLANG" IN_LIST Deprecated_FIND_COMPONENTS)
 
   if ("${ZEPHYR_TOOLCHAIN_VARIANT}" STREQUAL "xcc"
       AND "$ENV{XCC_USE_CLANG}" STREQUAL "1")
-    set(ZEPHYR_TOOLCHAIN_VARIANT xcc-clang)
+    set(ZEPHYR_TOOLCHAIN_VARIANT xcc-clang CACHE STRING "Zephyr toolchain variant" FORCE)
     message(DEPRECATION "XCC_USE_CLANG is deprecated. Please set ZEPHYR_TOOLCHAIN_VARIANT to 'xcc-clang'")
   endif()
 endif()
@@ -61,7 +61,7 @@ if("CROSS_COMPILE" IN_LIST Deprecated_FIND_COMPONENTS)
 
   if(NOT ZEPHYR_TOOLCHAIN_VARIANT AND
      (CROSS_COMPILE OR (DEFINED ENV{CROSS_COMPILE})))
-      set(ZEPHYR_TOOLCHAIN_VARIANT cross-compile)
+      set(ZEPHYR_TOOLCHAIN_VARIANT cross-compile CACHE STRING "Zephyr toolchain variant" FORCE)
       message(DEPRECATION  "CROSS_COMPILE is deprecated. Please set ZEPHYR_TOOLCHAIN_VARIANT to 'cross-compile'")
   endif()
 endif()
diff --git a/cmake/modules/FindZephyr-sdk.cmake b/cmake/modules/FindZephyr-sdk.cmake
index e7eff17b490..b488c3fae85 100644
--- a/cmake/modules/FindZephyr-sdk.cmake
+++ b/cmake/modules/FindZephyr-sdk.cmake
@@ -23,13 +23,9 @@
 # True if the Zephyr SDK was found.
 
 # Set internal variables if set in environment.
-if(NOT DEFINED ZEPHYR_TOOLCHAIN_VARIANT)
-  set(ZEPHYR_TOOLCHAIN_VARIANT $ENV{ZEPHYR_TOOLCHAIN_VARIANT})
-endif()
+zephyr_get(ZEPHYR_TOOLCHAIN_VARIANT)
 
-if(NOT DEFINED ZEPHYR_SDK_INSTALL_DIR)
-  set(ZEPHYR_SDK_INSTALL_DIR $ENV{ZEPHYR_SDK_INSTALL_DIR})
-endif()
+zephyr_get(ZEPHYR_SDK_INSTALL_DIR)
 
 # Load Zephyr SDK Toolchain.
 # There are three scenarios where Zephyr SDK should be looked up:
diff --git a/cmake/toolchain/arcmwdt/generic.cmake b/cmake/toolchain/arcmwdt/generic.cmake
index 3c258dfc8c5..6dec614d1cb 100644
--- a/cmake/toolchain/arcmwdt/generic.cmake
+++ b/cmake/toolchain/arcmwdt/generic.cmake
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
-set_ifndef(ARCMWDT_TOOLCHAIN_PATH "$ENV{ARCMWDT_TOOLCHAIN_PATH}")
-set(ARCMWDT_TOOLCHAIN_PATH ${ARCMWDT_TOOLCHAIN_PATH} CACHE PATH "mwdt tools install directory")
+zephyr_get(ARCMWDT_TOOLCHAIN_PATH)
 assert(ARCMWDT_TOOLCHAIN_PATH "ARCMWDT_TOOLCHAIN_PATH is not set")
 
 if(NOT EXISTS ${ARCMWDT_TOOLCHAIN_PATH})
diff --git a/cmake/toolchain/armclang/generic.cmake b/cmake/toolchain/armclang/generic.cmake
index 769ba2c2ff0..bd78c8861e4 100644
--- a/cmake/toolchain/armclang/generic.cmake
+++ b/cmake/toolchain/armclang/generic.cmake
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
-set_ifndef(ARMCLANG_TOOLCHAIN_PATH "$ENV{ARMCLANG_TOOLCHAIN_PATH}")
-set(ARMCLANG_TOOLCHAIN_PATH ${ARMCLANG_TOOLCHAIN_PATH} CACHE PATH "armclang tools install directory")
+zephyr_get(ARMCLANG_TOOLCHAIN_PATH)
 assert(ARMCLANG_TOOLCHAIN_PATH "ARMCLANG_TOOLCHAIN_PATH is not set")
 
 if(${CMAKE_VERSION} VERSION_LESS 3.21
diff --git a/cmake/toolchain/espressif/generic.cmake b/cmake/toolchain/espressif/generic.cmake
index 0ec5424be83..a1e892f5a15 100644
--- a/cmake/toolchain/espressif/generic.cmake
+++ b/cmake/toolchain/espressif/generic.cmake
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
-set_ifndef(ESPRESSIF_TOOLCHAIN_PATH "$ENV{ESPRESSIF_TOOLCHAIN_PATH}")
-set(       ESPRESSIF_TOOLCHAIN_PATH ${ESPRESSIF_TOOLCHAIN_PATH} CACHE PATH "")
+zephyr_get(ESPRESSIF_TOOLCHAIN_PATH)
 assert(    ESPRESSIF_TOOLCHAIN_PATH "ESPRESSIF_TOOLCHAIN_PATH is not set")
 
 set(TOOLCHAIN_HOME ${ESPRESSIF_TOOLCHAIN_PATH})
diff --git a/cmake/toolchain/espressif/target.cmake b/cmake/toolchain/espressif/target.cmake
index f11f48883ab..cd40b1530a7 100644
--- a/cmake/toolchain/espressif/target.cmake
+++ b/cmake/toolchain/espressif/target.cmake
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
-set_ifndef(ESPRESSIF_TOOLCHAIN_PATH "$ENV{ESPRESSIF_TOOLCHAIN_PATH}")
-set(       ESPRESSIF_TOOLCHAIN_PATH ${ESPRESSIF_TOOLCHAIN_PATH} CACHE PATH "")
+zephyr_get(ESPRESSIF_TOOLCHAIN_PATH)
 assert(    ESPRESSIF_TOOLCHAIN_PATH "ESPRESSIF_TOOLCHAIN_PATH is not set")
 
 set(COMPILER gcc)
diff --git a/cmake/toolchain/gnuarmemb/generic.cmake b/cmake/toolchain/gnuarmemb/generic.cmake
index 6eb04b32ae4..db59e5fc707 100644
--- a/cmake/toolchain/gnuarmemb/generic.cmake
+++ b/cmake/toolchain/gnuarmemb/generic.cmake
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
-set_ifndef(GNUARMEMB_TOOLCHAIN_PATH "$ENV{GNUARMEMB_TOOLCHAIN_PATH}")
-set(       GNUARMEMB_TOOLCHAIN_PATH ${GNUARMEMB_TOOLCHAIN_PATH} CACHE PATH "gnuarmemb install directory")
+zephyr_get(GNUARMEMB_TOOLCHAIN_PATH)
 assert(    GNUARMEMB_TOOLCHAIN_PATH "GNUARMEMB_TOOLCHAIN_PATH is not set")
 
 if(NOT EXISTS ${GNUARMEMB_TOOLCHAIN_PATH})
diff --git a/cmake/toolchain/llvm/generic.cmake b/cmake/toolchain/llvm/generic.cmake
index 0f24abbe98b..3cdf6d51ca5 100644
--- a/cmake/toolchain/llvm/generic.cmake
+++ b/cmake/toolchain/llvm/generic.cmake
@@ -1,7 +1,9 @@
 # SPDX-License-Identifier: Apache-2.0
 
+# Todo: deprecate CLANG_ROOT_DIR
 set_ifndef(LLVM_TOOLCHAIN_PATH "$ENV{CLANG_ROOT_DIR}")
-set_ifndef(LLVM_TOOLCHAIN_PATH "$ENV{LLVM_TOOLCHAIN_PATH}")
+zephyr_get(LLVM_TOOLCHAIN_PATH)
+
 if(LLVM_TOOLCHAIN_PATH)
   set(TOOLCHAIN_HOME ${LLVM_TOOLCHAIN_PATH}/bin/)
 endif()
diff --git a/cmake/toolchain/oneApi/generic.cmake b/cmake/toolchain/oneApi/generic.cmake
index 011998c53f7..c72a7a873db 100644
--- a/cmake/toolchain/oneApi/generic.cmake
+++ b/cmake/toolchain/oneApi/generic.cmake
@@ -1,9 +1,9 @@
 # SPDX-License-Identifier: Apache-2.0
 
-if($ENV{ONEAPI_ROOT})
-  set_ifndef(ONEAPI_TOOLCHAIN_PATH "$ENV{ONEAPI_ROOT}")
+if(DEFINED ENV{ONEAPI_ROOT})
+  set_ifndef(ONEAPI_TOOLCHAIN_PATH $ENV{ONEAPI_ROOT})
 else()
-  set_ifndef(ONEAPI_TOOLCHAIN_PATH "$ENV{ONEAPI_TOOLCHAIN_PATH}")
+  zephyr_get(ONEAPI_TOOLCHAIN_PATH)
 endif()
 
 # the default oneApi installation path is related to os
diff --git a/cmake/toolchain/xcc/common.cmake b/cmake/toolchain/xcc/common.cmake
index 756c1cf3df9..7bca32f4e45 100644
--- a/cmake/toolchain/xcc/common.cmake
+++ b/cmake/toolchain/xcc/common.cmake
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
-set_ifndef(XTENSA_TOOLCHAIN_PATH "$ENV{XTENSA_TOOLCHAIN_PATH}")
-set(       XTENSA_TOOLCHAIN_PATH ${XTENSA_TOOLCHAIN_PATH} CACHE PATH "xtensa tools install directory")
+zephyr_get(XTENSA_TOOLCHAIN_PATH)
 assert(    XTENSA_TOOLCHAIN_PATH "XTENSA_TOOLCHAIN_PATH is not set")
 
 if(NOT EXISTS ${XTENSA_TOOLCHAIN_PATH})
diff --git a/cmake/toolchain/xtools/generic.cmake b/cmake/toolchain/xtools/generic.cmake
index f4836eb5775..bec6bd09c0e 100644
--- a/cmake/toolchain/xtools/generic.cmake
+++ b/cmake/toolchain/xtools/generic.cmake
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
-set_ifndef(XTOOLS_TOOLCHAIN_PATH "$ENV{XTOOLS_TOOLCHAIN_PATH}")
-set(       XTOOLS_TOOLCHAIN_PATH     ${XTOOLS_TOOLCHAIN_PATH} CACHE PATH "")
+zephyr_get(XTOOLS_TOOLCHAIN_PATH)
 assert(    XTOOLS_TOOLCHAIN_PATH      "XTOOLS_TOOLCHAIN_PATH is not set")
 
 set(TOOLCHAIN_HOME ${XTOOLS_TOOLCHAIN_PATH})