diff --git a/README.md b/README.md
index df18490..314fc7f 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,12 @@ AUR](https://aur.archlinux.org/packages/snap-pac/).
 After installation, the hooks are located at `/usr/share/libalpm/hooks`, and the
 scripts are located at `/usr/share/libalpm/hooks.bin/snap-pac`.
 
+## Configuration
+
+The configuration file is located at `/etc/snap-pac.conf`. There you can choose
+which snapper configurations of which to take snapshots, the descriptions used
+for the snapshots, and the snapper algorithm to use.
+
 ## Usage
 
 ### Taking snapshots
diff --git a/snapper-post b/snapper-post
index 17afb48..a02d38e 100755
--- a/snapper-post
+++ b/snapper-post
@@ -22,11 +22,14 @@
 
 source /etc/snap-pac.conf
 
+cleanupalgo=${CLEANUP_ALGORITHM:-"number"}
+description=${POST_DESCRIPTION:-"$(ps -C pacman -o args=)"}
+configurations=${CONFIGS:-"root"}
 PREFILE_PREFIX="/usr/share/libalpm/hooks.bin/snap-pac/.pre"
-for x in $CONFIGS; do
+for x in $configurations; do
     if [ -f $PREFILE_PREFIX"_"$x ]; then
         SNAPPERPACPRE=$(cat $PREFILE_PREFIX"_"$x)
-        snapper --config $x create --cleanup-algorithm $CLEANUP_ALGORITHM --type post --pre-number $SNAPPERPACPRE --description "$PRE_DESCRIPTION"
+        snapper --config $x create --cleanup-algorithm $cleanupalgo --type post --pre-number $SNAPPERPACPRE --description "$description"
         rm $PREFILE_PREFIX"_"$x
     else
         echo "WARNING: $PREFILE_PREFIX"_"$x does not exist, so not performing post snapshot. If you are initially installing snap-pac, this is normal."
diff --git a/snapper-pre b/snapper-pre
index d042209..0920de6 100755
--- a/snapper-pre
+++ b/snapper-pre
@@ -22,7 +22,10 @@
 
 source /etc/snap-pac.conf
 
+cleanupalgo=${CLEANUP_ALGORITHM:-"number"}
+description=${PRE_DESCRIPTION:-"$(ps -C pacman -o args=)"}
+configurations=${CONFIGS:-"root"}
 PREFILE_PREFIX="/usr/share/libalpm/hooks.bin/snap-pac/.pre"
-for x in $CONFIGS; do
-    snapper --config $x create --type pre --cleanup-algorithm $CLEANUP_ALGORITHM --print-number --description "$POST_DESCRIPTION" > $PREFILE_PREFIX"_"$x
+for x in $configurations; do
+    snapper --config $x create --type pre --cleanup-algorithm $cleanupalgo --print-number --description "$description" > $PREFILE_PREFIX"_"$x
 done