diff --git a/.github/workflows/run-librispeech-2022-03-12.yml b/.github/workflows/run-librispeech-2022-03-12.yml
index 0e4d6130c..03b69af40 100644
--- a/.github/workflows/run-librispeech-2022-03-12.yml
+++ b/.github/workflows/run-librispeech-2022-03-12.yml
@@ -55,14 +55,21 @@ jobs:
 
       - name: Install Python dependencies
         run: |
-          pip install -r ./requirements-ci.txt
+          grep -v '^#' ./requirements-ci.txt  | xargs -n 1 -L 1 pip install
+
+      - name: Cache pre-trained model
+        id: cache-pretrained-model
+        uses: actions/cache@v2
+        with:
+          path: ~/tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
+          key: run-librispeech-2022-03-12
 
 
       - name: Download pre-trained model
+        if: steps.cache-pretrained-model.outputs.cache-hit != 'true'
         shell: bash
         run: |
           sudo apt-get -qq install git-lfs tree sox
-          cd egs/librispeech/ASR
           mkdir tmp
           cd tmp
           git lfs install
@@ -76,7 +83,7 @@ jobs:
         shell: bash
         run: |
           export PYTHONPATH=$PWD:PYTHONPATH
-          dir=./tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
+          dir=~/tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
           cd egs/librispeech/ASR
           ./pruned_transducer_stateless/pretrained.py \
             --method greedy_search \
@@ -91,7 +98,7 @@ jobs:
         shell: bash
         run: |
           export PYTHONPATH=$PWD:PYTHONPATH
-          dir=./tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
+          dir=~/tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
           cd egs/librispeech/ASR
           ./pruned_transducer_stateless/pretrained.py \
             --method greedy_search \
@@ -106,7 +113,7 @@ jobs:
         shell: bash
         run: |
           export PYTHONPATH=$PWD:PYTHONPATH
-          dir=./tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
+          dir=~/tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
           cd egs/librispeech/ASR
           ./pruned_transducer_stateless/pretrained.py \
             --method greedy_search \
@@ -121,7 +128,7 @@ jobs:
         shell: bash
         run: |
           export PYTHONPATH=$PWD:$PYTHONPATH
-          dir=./tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
+          dir=~/tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
           cd egs/librispeech/ASR
           ./pruned_transducer_stateless/pretrained.py \
             --method beam_search \
@@ -136,7 +143,7 @@ jobs:
         shell: bash
         run: |
           export PYTHONPATH=$PWD:$PYTHONPATH
-          dir=./tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
+          dir=~/tmp/icefall-asr-librispeech-pruned-transducer-stateless-2022-03-12
           cd egs/librispeech/ASR
           ./pruned_transducer_stateless/pretrained.py \
             --method modified_beam_search \
diff --git a/requirements-ci.txt b/requirements-ci.txt
index 5443eb931..9e8057499 100644
--- a/requirements-ci.txt
+++ b/requirements-ci.txt
@@ -1,3 +1,4 @@
+# Usage: grep -v '^#' requirements-ci.txt  | xargs -n 1 -L 1 pip install
 # dependencies for GitHub actions
 #
 # See https://github.com/actions/setup-python#caching-packages-dependencies
@@ -7,12 +8,10 @@ numpy==1.19
 pytest==7.1.0
 graphviz==0.19.1
 
--f https://download.pytorch.org/whl/cpu/torch_stable.html
-torch==1.10.0+cpu
-torchaudio==0.10.0+cpu
+-f https://download.pytorch.org/whl/cpu/torch_stable.html torch==1.10.0+cpu
+-f https://download.pytorch.org/whl/cpu/torch_stable.html torchaudio==0.10.0+cpu
 
--f https://k2-fsa.org/nightly/
-k2==1.9.dev20211101+cpu.torch1.10.0
+-f https://k2-fsa.org/nightly/ k2==1.9.dev20211101+cpu.torch1.10.0
 
 lhotse==0.12.0
 kaldifeat==1.12