diff --git a/debian/postinst b/debian/postinst
index e85e9c1..ea16997 100644
--- a/debian/postinst
+++ b/debian/postinst
@@ -11,8 +11,8 @@ case "$1" in
         fi
 
         # Configure NSS for pam-pkcs11 and pam-sss
-	mkdir -p /etc/pki/nssdb
-	orange-certupdate /etc/pki/nssdb >/dev/null || true
+        mkdir -p /etc/pki/nssdb
+        orange-certupdate /etc/pki/nssdb >/dev/null || true
         orange-dongle-aladdin --force update /etc/pki/nssdb || true
 
         # Configure certificates for SSSD (OpenSSL)
@@ -33,11 +33,13 @@ case "$1" in
             # a config file in dir /usr/share/pam-configs.
         fi
 
-	# Configure PAM
-	pam-auth-update --package \
-	    --remove sss krb5 \
-	    --enable yourdev ccreds-check ccreds-save || true
-	for profile in sss krb5 yourdev ; do
+        # Configure PAM
+        # Force non-interactive mode to avoid useless debconf message
+        # about conflict between sss and yourdev profiles (see #12)
+        DEBIAN_FRONTEND=noninteractive pam-auth-update --package \
+            --remove sss krb5 \
+            --enable yourdev ccreds-check ccreds-save || true
+        for profile in sss krb5 yourdev ; do
             grep -qw "$profile" /var/lib/pam/seen \
             || echo "$profile" >> /var/lib/pam/seen || true
         done