diff --git a/jenkins/scripts/cross_compile.sh b/jenkins/scripts/cross_compile.sh
index f441b9f..71140e1 100755
--- a/jenkins/scripts/cross_compile.sh
+++ b/jenkins/scripts/cross_compile.sh
@@ -15,14 +15,14 @@ TOOLCHAIN_FILE=$TRAVIS_BUILD_DIR/toolchain-win64.cmake
 ## Install zlib for windows
 cd /tmp/zlib_cross
 export CC=x86_64-w64-mingw32-gcc-posix
-./configure --prefix=/tmp/zlib_cross
-make -f win32/Makefile.gcc BINARY_PATH=/tmp/zlib_cross/bin INCLUDE_PATH=/tmp/zlib_cross/include LIBRARY_PATH=/tmp/zlib_cross/lib PREFIX=x86_64-w64-mingw32- install
+nice -n 5 chrt -b 0 ./configure --prefix=/tmp/zlib_cross
+nice -n 5 chrt -b 0 make -f win32/Makefile.gcc BINARY_PATH=/tmp/zlib_cross/bin INCLUDE_PATH=/tmp/zlib_cross/include LIBRARY_PATH=/tmp/zlib_cross/lib PREFIX=x86_64-w64-mingw32- install
 
 ## Install openssl for windows
 cd /tmp/openssl_cross
 export CC=
-./Configure --cross-compile-prefix=x86_64-w64-mingw32- --prefix=/tmp/openssl_cross mingw64 shared
-sudo make install
+nice -n 5 chrt -b 0 ./Configure --cross-compile-prefix=x86_64-w64-mingw32- --prefix=/tmp/openssl_cross mingw64 shared
+nice -n 5 chrt -b 0 sudo make install
 
 # ====== Prepare TdLib
 # Cross compilation preparation (also needed for split sources)