diff --git a/.circleci/config.yml b/.circleci/config.yml
index 22fd6b5..00ae890 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -98,8 +98,7 @@ jobs:
     steps:
       - checkout
       - setup_remote_docker
-      - run: docker build -t conda -f docker/conda.dockerfile .
-      - run: docker build --build-arg BASE=conda -t researchdeezer/spleeter:conda -f docker/spleeter-conda.dockerfile .
+      - run: docker build --build-arg BASE=continuumio/miniconda3:4.7.10 -t researchdeezer/spleeter:conda -f docker/spleeter-conda.dockerfile .
       - run: docker build --build-arg BASE=researchdeezer/spleeter:conda --build-arg MODEL=2stems -t researchdeezer/spleeter:conda-2stems -f docker/spleeter-model.dockerfile .
       - run: docker build --build-arg BASE=researchdeezer/spleeter:conda --build-arg MODEL=4stems -t researchdeezer/spleeter:conda-4stems -f docker/spleeter-model.dockerfile .
       - run: docker build --build-arg BASE=researchdeezer/spleeter:conda --build-arg MODEL=5stems -t researchdeezer/spleeter:conda-5stems -f docker/spleeter-model.dockerfile .
@@ -118,8 +117,7 @@ jobs:
     steps:
       - checkout
       - setup_remote_docker
-      - run: docker build -t conda -f docker/conda.dockerfile .
-      - run: docker build --build-arg BASE=conda -t conda-gpu -f docker/cuda-10-0.dockerfile .
+      - run: docker build --build-arg BASE=continuumio/miniconda3:4.7.10 -t conda-gpu -f docker/cuda-10-0.dockerfile .
       - run: docker build --build-arg BASE=conda-gpu --build-arg SPLEETER_PACKAGE=spleeter-gpu -t researchdeezer/spleeter:conda-gpu -f docker/spleeter-conda.dockerfile .
       - run: docker build --build-arg BASE=researchdeezer/spleeter:conda-gpu --build-arg MODEL=2stems -t researchdeezer/spleeter:conda-gpu-2stems -f docker/spleeter-model.dockerfile .
       - run: docker build --build-arg BASE=researchdeezer/spleeter:conda-gpu --build-arg MODEL=4stems -t researchdeezer/spleeter:conda-gpu-4stems -f docker/spleeter-model.dockerfile .
diff --git a/docker/spleeter-conda.dockerfile b/docker/spleeter-conda.dockerfile
index ae79f4a..c085b25 100644
--- a/docker/spleeter-conda.dockerfile
+++ b/docker/spleeter-conda.dockerfile
@@ -7,8 +7,6 @@ ARG SPLEETER_VERSION=1.5.3
 ENV MODEL_PATH /model
 
 RUN mkdir -p /model
-COPY audio_example.mp3 .
-
 RUN conda install -y -c conda-forge musdb
 RUN conda install -y -c conda-forge ${SPLEETER_PACKAGE}==${SPLEETER_VERSION}
 
diff --git a/docker/spleeter.dockerfile b/docker/spleeter.dockerfile
index c7029b1..1161c3a 100644
--- a/docker/spleeter.dockerfile
+++ b/docker/spleeter.dockerfile
@@ -7,8 +7,6 @@ ARG SPLEETER_VERSION=1.5.3
 ENV MODEL_PATH /model
 
 RUN mkdir -p /model
-COPY audio_example.mp3 .
-
 RUN apt-get update && apt-get install -y ffmpeg libsndfile1
 RUN pip install musdb museval
 RUN pip install ${SPLEETER_PACKAGE}==${SPLEETER_VERSION}