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-rwxr-xr-xtests/docker/dockerfiles/debian-bootstrap.pre4
1 files changed, 2 insertions, 2 deletions
diff --git a/tests/docker/dockerfiles/debian-bootstrap.pre b/tests/docker/dockerfiles/debian-bootstrap.pre
index 3b0ef95374..c164778c30 100755
--- a/tests/docker/dockerfiles/debian-bootstrap.pre
+++ b/tests/docker/dockerfiles/debian-bootstrap.pre
@@ -2,7 +2,7 @@
 #
 # Simple wrapper for debootstrap, run in the docker build context
 #
-FAKEROOT=`which fakeroot 2> /dev/null`
+FAKEROOT=$(which fakeroot 2> /dev/null)
 # debootstrap < 1.0.67 generates empty sources.list, see Debian#732255
 MIN_DEBOOTSTRAP_VERSION=1.0.67
 
@@ -52,7 +52,7 @@ fi
 
 if [ -z $DEBOOTSTRAP_DIR ]; then
     NEED_DEBOOTSTRAP=false
-    DEBOOTSTRAP=`which debootstrap 2> /dev/null`
+    DEBOOTSTRAP=$(which debootstrap 2> /dev/null)
     if [ -z $DEBOOTSTRAP ]; then
         echo "No debootstrap installed, attempting to install from SCM"
         NEED_DEBOOTSTRAP=true