Docker build falhando

Oi, Não consigo passar da parte que faz o build do Docker. Eu consigo executar até o passo 4 (Step 4/7 : COPY requirements.txt ./ ), contudo no passo do pip install ele dá o erro abaixo:

Step 5/7 : RUN pip install --no-cache-dir -r requirements.txt


 ---> Running in e95e084e0a73

Collecting wheel==0.29.0

[91m  WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)'),)': /packages/8a/e9/8468cd68b582b06ef554be0b96b59f59779627131aad48f8a5bce4b13450/wheel-0.29.0-py2.py3-none-any.whl

ERROR: Build step failed with exception
com.github.dockerjava.api.exception.DockerClientException: Could not build image: The command '/bin/sh -c pip install --no-cache-dir -r requirements.txt' returned a non-zero code: 1
    at com.github.dockerjava.core.command.BuildImageResultCallback.getImageId(BuildImageResultCallback.java:79)
    at com.github.dockerjava.core.command.BuildImageResultCallback.awaitImageId(BuildImageResultCallback.java:51)
    at com.nirima.jenkins.plugins.docker.builder.DockerBuilderPublisher$Run.buildImage(DockerBuilderPublisher.java:370)
    at com.nirima.jenkins.plugins.docker.builder.DockerBuilderPublisher$Run.run(DockerBuilderPublisher.java:310)
    at com.nirima.jenkins.plugins.docker.builder.DockerBuilderPublisher.perform(DockerBuilderPublisher.java:451)
    at jenkins.tasks.SimpleBuildStep.perform(SimpleBuildStep.java:123)
    at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:80)
    at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
    at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:803)
    at hudson.model.Build$BuildExecution.build(Build.java:197)
    at hudson.model.Build$BuildExecution.doRun(Build.java:163)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:513)
    at hudson.model.Run.execute(Run.java:1907)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
    at hudson.model.ResourceController.execute(ResourceController.java:97)
    at hudson.model.Executor.run(Executor.java:429)
Build step 'Build / Publish Docker Image' marked build as failure
Finished: FAILURE

Vi que é um erro de SSL mas não entendi onde. Alguém pode me ajudar?