diff --git a/autogen.des b/autogen.des
index 89fcfff..41d7d4b 100755
--- a/autogen.des
+++ b/autogen.des
@@ -4,6 +4,20 @@ has() {
 	which "$@" >/dev/null 2>&1
 }
 
+# Evaluate any envar assignments present on the command line
+for arg ; do
+	case "${arg}" in
+	--prefix=*)
+		PREFIX="${arg#*=}"
+		export PREFIX
+		;;
+	CC=*|CXX=*|CPP=*|PREFIX=*)
+		eval "${arg}"
+		export "${arg%%=*}"
+		;;
+	esac
+done
+
 # BullseyeCoverage needs to know exactly which compiler we're using
 if has "${CC}" "${CXX}" ; then
 	echo "using CC=${CC}"
@@ -19,10 +33,27 @@ else
 	echo "WARNING: using default compiler," \
 	    "coverage analysis may not work"
 fi
-export CPP="${CPP:-${CC} -E}"
+if [ -n "${CC}" ] ; then
+	export CPP="${CPP:-${CC} -E}"
+fi
+
+# If a prefix was provided, look for autoconf and pkg-config directories
+if [ -n "${PREFIX}" ] ; then
+	if [ -f "${PREFIX}/share/aclocal/cryb_to.m4" ] ; then
+		export ACLOCAL_PATH="${PREFIX}/share/aclocal:${ACLOCAL_PATH}"
+		ACLOCAL_PATH="${ACLOCAL_PATH%:}"
+		export ACLOCAL_PATH
+	fi
+	if [ -f "${PREFIX}/lib/pkgconfig/cryb-core.pc" ] ; then
+		PKG_CONFIG_PATH="${PREFIX}/lib/pkgconfig:${PKG_CONFIG_PATH}"
+		PKG_CONFIG_PATH="${PKG_CONFIG_PATH%:}"
+		export PKG_CONFIG_PATH
+	fi
+fi
 
 set -e
 
+# Push coverage state and disable
 if has cov01 ; then
 	cov01 -qu
 	cov01 -q0
@@ -31,11 +62,13 @@ fi
 . ./autogen.sh
 
 ./configure \
+    ${PREFIX:+--prefix="${PREFIX}"} \
     --enable-all \
     --enable-developer-warnings \
     --enable-werror \
     "$@"
 
+# Restore coverage state
 if has cov01 ; then
 	cov01 -qo
 fi