diff --git a/docker/torch1.12.1-cuda11.3.dockerfile b/docker/torch1.12.1-cuda11.3.dockerfile
index ed746abe33..deb5715ccb 100644
--- a/docker/torch1.12.1-cuda11.3.dockerfile
+++ b/docker/torch1.12.1-cuda11.3.dockerfile
@@ -18,7 +18,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         curl \
         vim \
-    		libssl-dev \
+    	libssl-dev \
         autoconf \
         automake \
         bzip2 \
@@ -44,7 +44,6 @@ RUN pip install --no-cache-dir \
       k2==${K2_VERSION} -f https://k2-fsa.github.io/k2/cuda.html \
       git+https://github.com/lhotse-speech/lhotse \
       kaldifeat==${KALDIFEAT_VERSION} -f https://csukuangfj.github.io/kaldifeat/cuda.html \
-      \
       kaldi_native_io \
       kaldialign \
       kaldifst \
diff --git a/docker/torch1.13.0-cuda11.6.dockerfile b/docker/torch1.13.0-cuda11.6.dockerfile
index 9657866e54..afc6c1b847 100644
--- a/docker/torch1.13.0-cuda11.6.dockerfile
+++ b/docker/torch1.13.0-cuda11.6.dockerfile
@@ -18,7 +18,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         curl \
         vim \
-    		libssl-dev \
+    	libssl-dev \
         autoconf \
         automake \
         bzip2 \
@@ -44,7 +44,6 @@ RUN pip install --no-cache-dir \
       k2==${K2_VERSION} -f https://k2-fsa.github.io/k2/cuda.html \
       git+https://github.com/lhotse-speech/lhotse \
       kaldifeat==${KALDIFEAT_VERSION} -f https://csukuangfj.github.io/kaldifeat/cuda.html \
-      \
       kaldi_native_io \
       kaldialign \
       kaldifst \
diff --git a/docker/torch1.9.0-cuda10.2.dockerfile b/docker/torch1.9.0-cuda10.2.dockerfile
index a92af7ad00..9ff225b54d 100644
--- a/docker/torch1.9.0-cuda10.2.dockerfile
+++ b/docker/torch1.9.0-cuda10.2.dockerfile
@@ -25,7 +25,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         curl \
         vim \
-    		libssl-dev \
+    	libssl-dev \
         autoconf \
         automake \
         bzip2 \
@@ -58,7 +58,6 @@ RUN pip uninstall -y tqdm && \
       k2==${K2_VERSION} -f https://k2-fsa.github.io/k2/cuda.html \
       kaldifeat==${KALDIFEAT_VERSION} -f https://csukuangfj.github.io/kaldifeat/cuda.html \
       git+https://github.com/lhotse-speech/lhotse \
-      \
       kaldi_native_io \
       kaldialign \
       kaldifst \
diff --git a/docker/torch2.0.0-cuda11.7.dockerfile b/docker/torch2.0.0-cuda11.7.dockerfile
index 07296e6f06..db8076560e 100644
--- a/docker/torch2.0.0-cuda11.7.dockerfile
+++ b/docker/torch2.0.0-cuda11.7.dockerfile
@@ -18,7 +18,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         curl \
         vim \
-    		libssl-dev \
+    	libssl-dev \
         autoconf \
         automake \
         bzip2 \
@@ -44,7 +44,6 @@ RUN pip install --no-cache-dir \
       k2==${K2_VERSION} -f https://k2-fsa.github.io/k2/cuda.html \
       git+https://github.com/lhotse-speech/lhotse \
       kaldifeat==${KALDIFEAT_VERSION} -f https://csukuangfj.github.io/kaldifeat/cuda.html \
-      \
       kaldi_native_io \
       kaldialign \
       kaldifst \
diff --git a/docker/torch2.1.0-cuda11.8.dockerfile b/docker/torch2.1.0-cuda11.8.dockerfile
index e500e9a6a6..b006b0d968 100644
--- a/docker/torch2.1.0-cuda11.8.dockerfile
+++ b/docker/torch2.1.0-cuda11.8.dockerfile
@@ -18,7 +18,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         curl \
         vim \
-    		libssl-dev \
+    	libssl-dev \
         autoconf \
         automake \
         bzip2 \
@@ -44,7 +44,6 @@ RUN pip install --no-cache-dir \
       k2==${K2_VERSION} -f https://k2-fsa.github.io/k2/cuda.html \
       git+https://github.com/lhotse-speech/lhotse \
       kaldifeat==${KALDIFEAT_VERSION} -f https://csukuangfj.github.io/kaldifeat/cuda.html \
-      \
       kaldi_native_io \
       kaldialign \
       kaldifst \
diff --git a/docker/torch2.1.0-cuda12.1.dockerfile b/docker/torch2.1.0-cuda12.1.dockerfile
index c3f12323ec..1b078dc224 100644
--- a/docker/torch2.1.0-cuda12.1.dockerfile
+++ b/docker/torch2.1.0-cuda12.1.dockerfile
@@ -18,7 +18,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         curl \
         vim \
-    		libssl-dev \
+    	libssl-dev \
         autoconf \
         automake \
         bzip2 \
@@ -44,7 +44,6 @@ RUN pip install --no-cache-dir \
       k2==${K2_VERSION} -f https://k2-fsa.github.io/k2/cuda.html \
       git+https://github.com/lhotse-speech/lhotse \
       kaldifeat==${KALDIFEAT_VERSION} -f https://csukuangfj.github.io/kaldifeat/cuda.html \
-      \
       kaldi_native_io \
       kaldialign \
       kaldifst \