diff --git a/.drone.yml b/.drone.yml
index 7635300..17233fa 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -155,7 +155,7 @@ steps:
   - rm /etc/apt/apt.conf.d/docker-clean
   - alias apt-get='rm -f /var/cache/apt/archives/lock && apt-get'
   - apt-get update -q
-  - apt-get install -qq build-essential cmake clang locales lsb-release
+  - apt-get install -qq build-essential cmake clang locales lsb-release file
   - apt-get install -qq libboost-program-options-dev libboost-locale-dev libboost-regex-dev libboost-log-dev gettext libarchive-dev libfmt-dev libpugixml-dev nlohmann-json3-dev
   - apt-get install -qq --no-install-recommends asciidoc xsltproc
   - rm -rf build_deb && mkdir -p build_deb && cd build_deb
@@ -181,7 +181,7 @@ steps:
   - rm /etc/apt/apt.conf.d/docker-clean
   - alias apt-get='rm -f /var/cache/apt/archives/lock && apt-get'
   - apt-get update -q
-  - apt-get install -qq build-essential cmake clang locales lsb-release
+  - apt-get install -qq build-essential cmake clang locales lsb-release file
   - apt-get install -qq libboost-program-options-dev libboost-locale-dev libboost-regex-dev libboost-log-dev gettext libarchive-dev libfmt-dev libpugixml-dev nlohmann-json-dev
   - apt-get install -qq --no-install-recommends asciidoc xsltproc
   - rm -rf build_deb && mkdir -p build_deb && cd build_deb
@@ -208,7 +208,7 @@ steps:
   - rm /etc/apt/apt.conf.d/docker-clean
   - alias apt-get='rm -f /var/cache/apt/archives/lock && apt-get'
   - apt-get update -q
-  - apt-get install -qq build-essential cmake clang locales lsb-release
+  - apt-get install -qq build-essential cmake clang locales lsb-release file
   - apt-get install -qq libboost-program-options-dev libboost-locale-dev libboost-regex-dev libboost-log-dev gettext libarchive-dev libfmt-dev libpugixml-dev nlohmann-json3-dev
   - apt-get install -qq --no-install-recommends asciidoc xsltproc
   - rm -rf build_deb && mkdir -p build_deb && cd build_deb
@@ -246,7 +246,7 @@ steps:
   - rm /etc/apt/apt.conf.d/docker-clean
   - alias apt-get='rm -f /var/cache/apt/archives/lock && apt-get'
   - apt-get update -q
-  - apt-get install -qq g++-8 build-essential clang locales lsb-release
+  - apt-get install -qq g++-8 build-essential clang locales lsb-release file
   - apt-get install -qq libboost-program-options-dev libboost-locale-dev libboost-regex-dev libboost-log-dev gettext libarchive-dev libfmt-dev libpugixml-dev nlohmann-json-dev
   - apt-get install -qq --no-install-recommends asciidoc xsltproc
   - sh cmake_installer.sh --skip-license --exclude-subdir --prefix=/usr/local