diff --git a/examples/librispeech/s2/local/data_prep.sh b/examples/librispeech/s2/local/data_prep.sh
old mode 100644
new mode 100755
diff --git a/examples/librispeech/s2/path.sh b/examples/librispeech/s2/path.sh
index eec437b60cb19974d738d21ae4f2deed69e5912e..32ff28c1024e8a9b2f13c259d38108efc65dfa55 100644
--- a/examples/librispeech/s2/path.sh
+++ b/examples/librispeech/s2/path.sh
@@ -1,6 +1,6 @@
 export MAIN_ROOT=`realpath ${PWD}/../../../`
 
-export PATH=${MAIN_ROOT}:${MAIN_ROOT}/tools/sctk/bin:${PWD}/utils:${PATH}
+export PATH=${MAIN_ROOT}:${MAIN_ROOT}/tools/sctk/bin:${MAIN_ROOT}/utils:${PWD}/utils:${PATH}
 export LC_ALL=C
 
 export PYTHONDONTWRITEBYTECODE=1
@@ -13,3 +13,16 @@ export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/lib/
 
 MODEL=u2_kaldi
 export BIN_DIR=${MAIN_ROOT}/deepspeech/exps/${MODEL}/bin
+
+# srilm
+export LIBLBFGS=${MAIN_ROOT}/tools/liblbfgs-1.10
+export LD_LIBRARY_PATH=${LD_LIBRARY_PATH:-}:${LIBLBFGS}/lib/.libs
+export SRILM=${MAIN_ROOT}/tools/srilm
+export PATH=${PATH}:${SRILM}/bin:${SRILM}/bin/i686-m64
+
+# Kaldi
+export KALDI_ROOT=${MAIN_ROOT}/tools/kaldi
+[ -f $KALDI_ROOT/tools/env.sh ] && . $KALDI_ROOT/tools/env.sh
+export PATH=$PWD/utils/:$KALDI_ROOT/tools/openfst/bin:$PWD:$PATH
+[ ! -f $KALDI_ROOT/tools/config/common_path.sh ] && echo >&2 "The standard file $KALDI_ROOT/tools/config/common_path.sh is not present, can not using Kaldi!"
+[ -f $KALDI_ROOT/tools/config/common_path.sh ] && . $KALDI_ROOT/tools/config/common_path.sh
\ No newline at end of file
diff --git a/tools/Makefile b/tools/Makefile
index 22f28b36e5ef981468787fad67fa39d51dc127a6..36ac7d5490f4f7235be8f48d540594431e0af0a3 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -10,7 +10,7 @@ WGET ?= wget --no-check-certificate
 
 .PHONY: all clean
 
-all: virtualenv.done kenlm.done sox.done soxbindings.done mfa.done sclite.done
+all: virtualenv.done apt.done kenlm.done sox.done soxbindings.done mfa.done sclite.done kaldi.done
 
 virtualenv.done:
 	test -d venv || virtualenv -p $(PYTHON) venv
@@ -21,6 +21,12 @@ clean:
 	find -iname "*.pyc" -delete
 	rm -rf kenlm
 
+
+apt.done:
+	apt update -y
+	apt install -y flac jq vim tig tree pkg-config libflac-dev libogg-dev libvorbis-dev libboost-dev swig python3-dev 
+	touch apt.done
+
 kenlm.done:
 	# Ubuntu 16.04 透過 apt 會安裝 boost 1.58.0
 	# it seems that boost (1.54.0) requires higher version. After I switched to g++-5 it compiles normally.