diff --git a/Dockerfile b/Dockerfile
index a18bf82..d2ccecd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -77,14 +77,8 @@ RUN sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/debian.s
     update-locale LANG=${LANG} LANGUAGE=${LANGUAGE} LC_ALL=${LC_ALL} && \
     ln -fs /usr/share/zoneinfo/${TZ} /etc/localtime && \
     dpkg-reconfigure -f noninteractive tzdata && \
-    cat > /etc/default/keyboard <<'EOF'
-XKBMODEL="pc105"
-XKBLAYOUT="${COUNTRY}"
-XKBVARIANT=""
-XKBOPTIONS=""
-BACKSPACE="guess"
-EOF \
-    && dpkg-reconfigure -f noninteractive keyboard-configuration
+    printf 'XKBMODEL="pc105"\nXKBLAYOUT="%s"\nXKBVARIANT=""\nXKBOPTIONS=""\nBACKSPACE="guess"\n' "${COUNTRY}" > /etc/default/keyboard && \
+    dpkg-reconfigure -f noninteractive keyboard-configuration
 
 #COPY config/pam/ /etc/pam.d/
 #COPY config/nsswitch.conf /etc/nsswitch.conf