diff --git a/schroot/setup.d/05file b/schroot/setup.d/05file
index 921a7e2..334a539 100755
--- a/schroot/setup.d/05file
+++ b/schroot/setup.d/05file
@@ -28,15 +28,15 @@ check_filetype()
 {
     if echo "$CHROOT_FILE" | grep -q '\.tar$'; then
         filetype="tar"
-    elif echo "$CHROOT_FILE" | egrep -q '(\.tar\.gz|\.tgz)$'; then
+    elif echo "$CHROOT_FILE" | grep -E -q '(\.tar\.gz|\.tgz)$'; then
         filetype="tgz"
-    elif echo "$CHROOT_FILE" | egrep -q '(\.tar\.bz2|\.tbz)$'; then
+    elif echo "$CHROOT_FILE" | grep -E -q '(\.tar\.bz2|\.tbz)$'; then
         filetype="tbz"
-    elif echo "$CHROOT_FILE" | egrep -q '(\.tar\.xz|\.txz)$'; then
+    elif echo "$CHROOT_FILE" | grep -E -q '(\.tar\.xz|\.txz)$'; then
         filetype="txz"
-    elif echo "$CHROOT_FILE" | egrep -q '(\.tar\.lzo|\.tzo)$'; then
+    elif echo "$CHROOT_FILE" | grep -E -q '(\.tar\.lzo|\.tzo)$'; then
         filetype="tzo"
-    elif echo "$CHROOT_FILE" | egrep -q '(\.tar\.lz4|\.tlz4)$'; then
+    elif echo "$CHROOT_FILE" | grep -E -q '(\.tar\.lz4|\.tlz4)$'; then
         filetype="tlz4"
     else
         fatal "Unsupported filetype for $CHROOT_FILE"
diff --git a/schroot/setup.d/15killprocs b/schroot/setup.d/15killprocs
index a37c455..907a983 100755
--- a/schroot/setup.d/15killprocs
+++ b/schroot/setup.d/15killprocs
@@ -45,7 +45,7 @@ do_kill_all()
     fi
 
     info "Killing processes run inside $1"
-    ls /proc | egrep '^[[:digit:]]+$' |
+    ls /proc | grep -E '^[[:digit:]]+$' |
     while read pid; do
         # Check if process root are the same device/inode as chroot
         # root (for efficiency)
diff --git a/schroot/setup.d/20copyfiles b/schroot/setup.d/20copyfiles
index 2c01af9..7233c14 100755
--- a/schroot/setup.d/20copyfiles
+++ b/schroot/setup.d/20copyfiles
@@ -80,7 +80,7 @@ if [ $STAGE = "setup-start" ] || [ $STAGE = "setup-recover" ]; then
     if [ -n "$SETUP_COPYFILES" ]; then
         if [ -f "$SETUP_COPYFILES" ]; then
             while read file; do
-                if echo "$file" | egrep -q '^(#|$)' ; then
+                if echo "$file" | grep -E -q '^(#|$)' ; then
                     continue
                 fi
                 if echo "$file" | grep -q '^/'; then
diff --git a/schroot/setup.d/20nssdatabases b/schroot/setup.d/20nssdatabases
index 6ea83c0..c3e3bbc 100755
--- a/schroot/setup.d/20nssdatabases
+++ b/schroot/setup.d/20nssdatabases
@@ -37,7 +37,7 @@ if [ $STAGE = "setup-start" ] || [ $STAGE = "setup-recover" ]; then
     if [ -n "$SETUP_NSSDATABASES" ]; then
         if [ -f "$SETUP_NSSDATABASES" ]; then
             while read db; do
-                if echo "$db" | egrep -q '^(#|$)' ; then
+                if echo "$db" | grep -E -q '^(#|$)' ; then
                     continue
                 fi