[CI] fix R's installation (#3279)

53c64bac · Guolin Ke · GitHub · 82e2ff7a · 53c64bac
Unverified Commit 53c64bac authored Aug 06, 2020 by Guolin Ke Committed by GitHub Aug 06, 2020
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.ci/test_r_package.sh .ci/test_r_package.sh +1 -1

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--- a/.ci/test_r_package.sh
+++ b/.ci/test_r_package.sh
@@ -42,7 +42,7 @@ if [[ $AZURE != "true" ]] && [[ $OS_NAME == "linux" ]]; then
    sudo apt-get update
    sudo apt-get install \
        --no-install-recommends \
-        -y \
+        -y --allow-downgrades \
            r-base-dev=${R_LINUX_VERSION} \
            texinfo \
            texlive-latex-recommended \