diff --git a/sit b/sit
index d774ea5..a47b7fd 100755
--- a/sit
+++ b/sit
@@ -168,12 +168,11 @@ PACKAGENAME=${PACKAGENAME:=$PACKAGE}
 
 # construct the final installation directory path
 if [ -z $PREFIX ] ; then
-PREFIX="${PREFIX_BASE}/${CATEGORY}/${PACKAGE}/${VERSION}"
-PREFIX_SUFFIX=${MPI:+"-$MPI"}${MPI_VERSION_NUM:+"-$MPI_VERSION_NUM"}
-PREFIX_SUFFIX=$PREFIX_SUFFIX${COMPILER:+"-$COMPILER"}${COMPILER_VERSION:+"-$COMPILER_VERSION"}
-PREFIX_SUFFIX=$PREFIX_SUFFIX${PACKAGE_DESCRIPTOR:+-$PACKAGE_DESCRIPTOR}
-
-PREFIX=$PREFIX${PREFIX_SUFFIX:+"$PREFIX_SUFFIX"}
+    PREFIX="${PREFIX_BASE}/${CATEGORY}/${PACKAGE}/${VERSION}"
+    PREFIX_SUFFIX=${MPI:+"-$MPI"}${MPI_VERSION_NUM:+"-$MPI_VERSION_NUM"}
+    PREFIX_SUFFIX=$PREFIX_SUFFIX${COMPILER:+"-$COMPILER"}${COMPILER_VERSION:+"-$COMPILER_VERSION"}
+    PREFIX_SUFFIX=$PREFIX_SUFFIX${PACKAGE_DESCRIPTOR:+-$PACKAGE_DESCRIPTOR}
+    PREFIX=$PREFIX${PREFIX_SUFFIX:+"$PREFIX_SUFFIX"}
 fi
 
 # final working directory path
@@ -212,8 +211,8 @@ if [[ -d ${WORKDIR} && -z $sit_action ]] ; then
 fi
 
 if [ ! -d ${WORKDIR} ] ; then
-	mkdir -p ${WORKDIR}
-	mkdir -p ${BUILDDIR}
+    mkdir -p ${WORKDIR}
+    mkdir -p ${BUILDDIR}
 fi
 
 if [ ! -z ${LOGDIR} ] ; then