diff --git a/linux-ubuntu-18.sh b/linux-ubuntu-18.sh
index b8f29fd..e04b4bb 100755
--- a/linux-ubuntu-18.sh
+++ b/linux-ubuntu-18.sh
@@ -1,23 +1,23 @@
 sudo apt-get update
 sudo apt-get upgrade
-sudo apt-get install make git zlib1g-dev libssl-dev gperf php cmake default-jdk g++
+sudo apt-get install make git zlib1g-dev libssl-dev gperf php-cli cmake default-jdk clang-18 libc++-18-dev libc++abi-18-dev
 git clone https://github.com/tdlib/td.git
 cd td
-git checkout v1.6.0
+php SplitSource.php
 rm -rf build
 mkdir build
 cd build
-export CXXFLAGS=""
-cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=../example/java/td -DTD_ENABLE_JNI=ON ..
+CXXFLAGS="-stdlib=libc++" CC=/usr/bin/clang-18 CXX=/usr/bin/clang++-18 cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=../example/java/td -DTD_ENABLE_JNI=ON ..
 cmake --build . --target install
 cd ..
 cd example/java
 rm -rf build
 mkdir build
 cd build
-cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=../../../tdlib -DTd_DIR:PATH=$(readlink -e ../td/lib/cmake/Td) ..
+CXXFLAGS="-stdlib=libc++" CC=/usr/bin/clang-18 CXX=/usr/bin/clang++-18 cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=../../../tdlib -DTd_DIR:PATH=$(readlink -e ../td/lib/cmake/Td) ..
 cmake --build . --target install
 cd ../../..
+php SplitSource.php --undo
 cd ..
 ls -l td/tdlib
 export OS="ubuntu"