keep @Chost@ in activation scripts

sed-replace directly with ${CHOST_BASE}${CL_VERSION} install-pkg.sh

recipe/activate-clang_win-64.sh

@@ -102,26 +102,25 @@ else
   LIB_USED="${CONDA_PREFIX}/lib"
 fi
 
-CHOST=@CHOST_BASE@@CL_VERSION@
 WINSDK_INCLUDE=${CONDA_BUILD_WINSDK}/winsdk-@WINSDK_VERSION@/include
 WINSDK_LIB=${CONDA_BUILD_WINSDK}/winsdk-@WINSDK_VERSION@/lib
 MSVC_INCLUDE=${CONDA_BUILD_WINSDK}/msvc-@MSVC_HEADERS_VERSION@/include
 MSVC_LIB=${CONDA_BUILD_WINSDK}/msvc-@MSVC_HEADERS_VERSION@/lib
 INCLUDE_USED="${INCLUDE_USED};${MSVC_INCLUDE};${WINSDK_INCLUDE}/ucrt;${WINSDK_INCLUDE}/shared;${WINSDK_INCLUDE}/um;${WINSDK_INCLUDE}/winrt"
 LIB_USED="${LIB_USED};${WINSDK_LIB}/ucrt/x64;${WINSDK_LIB}/um/x64;${MSVC_LIB}/x64"
-CPPFLAGS_USED="-D_CRT_SECURE_NO_WARNINGS -D_MT -D_DLL --target=$CHOST -nostdlib -Xclang --dependent-lib=msvcrt -fuse-ld=lld -fno-aligned-allocation"
+CPPFLAGS_USED="-D_CRT_SECURE_NO_WARNINGS -D_MT -D_DLL --target=@CHOST@ -nostdlib -Xclang --dependent-lib=msvcrt -fuse-ld=lld -fno-aligned-allocation"
 # Only include overlay if there is one. We don't need it on case-insensitive file systems.
 if [ -f "${CONDA_BUILD_WINSDK}/winsdk-@WINSDK_VERSION@/winsdk_vfs_overlay.yaml" ]; then
   CPPFLAGS_USED="${CPPFLAGS_USED} -Xclang -ivfsoverlay -Xclang ${CONDA_BUILD_WINSDK}/winsdk-@WINSDK_VERSION@/winsdk_vfs_overlay.yaml"
 fi
-LDFLAGS_USED="--target=$CHOST -nostdlib -Xclang --dependent-lib=msvcrt -fuse-ld=lld"
+LDFLAGS_USED="--target=@CHOST@ -nostdlib -Xclang --dependent-lib=msvcrt -fuse-ld=lld"
 LDFLAGS_USED="${LDFLAGS_USED} -Wl,-defaultlib:@PREFIX@/lib/clang/@PKG_VERSION@/lib/windows/clang_rt.builtins-x86_64.lib"
 
 _tc_activation \
-  activate host $CHOST $CHOST- \
+  activate host @CHOST@ @CHOST@- \
   as clang clang++ \
-  "CC,${CC:-$CHOST-clang}" \
-  "CXX,${CXX:-$CHOST-clang++}" \
+  "CC,${CC:-@CHOST@-clang}" \
+  "CXX,${CXX:-@CHOST@-clang++}" \
   "LD,${LD-$(which lld-link)}" \
   "AR,${AR-$(which llvm-ar)}" \
   "RANLIB,${RANLIB-$(which llvm-ranlib)}" \

recipe/install-pkg.sh

@@ -49,8 +49,7 @@ do
     cp "${RECIPE_DIR}/${CHANGE}-${PKG_NAME}.sh" .
     sed -i.bak "s|@CFLAGS@|$FINAL_CFLAGS|g" ${CHANGE}-${PKG_NAME}.sh
     sed -i.bak "s|@CXXFLAGS@|$FINAL_CXXFLAGS|g" ${CHANGE}-${PKG_NAME}.sh
-    sed -i.bak "s|@CHOST_BASE@|$CHOST_BASE|g" ${CHANGE}-${PKG_NAME}.sh
-    sed -i.bak "s|@CL_VERSION@|$CL_VERSION|g" ${CHANGE}-${PKG_NAME}.sh
+    sed -i.bak "s|@CHOST@|${CHOST_BASE}${CL_VERSION}|g" ${CHANGE}-${PKG_NAME}.sh
     sed -i.bak "s|@PREFIX@|$PREFIX|g" ${CHANGE}-${PKG_NAME}.sh
     sed -i.bak "s|@PKG_VERSION@|$PKG_VERSION|g" ${CHANGE}-${PKG_NAME}.sh
     sed -i.bak "s|@MSVC_HEADERS_VERSION@|$MSVC_HEADERS_VERSION|g" ${CHANGE}-${PKG_NAME}.sh
@@ -61,8 +60,6 @@ do
     cp ${CHANGE}-${PKG_NAME}.sh ${PREFIX}/etc/conda/${CHANGE}.d/${CHANGE}-${PKG_NAME}.sh
 done
 
-CHOST=$CHOST_BASE$CL_VERSION
-
 if [[ "$PKG_NAME" == "clang_win-64" ]]; then
   mkdir -p $PREFIX/bin
   pushd ${PREFIX}/bin