diff --git a/contrib/devtools/build_autotools.sh b/contrib/devtools/build_autotools.sh
--- a/contrib/devtools/build_autotools.sh
+++ b/contrib/devtools/build_autotools.sh
@@ -21,7 +21,7 @@
 
 read -a CONFIGURE_FLAGS <<< "$CONFIGURE_FLAGS --prefix=$(pwd)"
 
-../configure --enable-deprecated-build-system "${CONFIGURE_FLAGS[@]}"
+"${TOPLEVEL}"/configure --enable-deprecated-build-system "${CONFIGURE_FLAGS[@]}"
 
 # Run build
 make -j "${THREADS}" "$@"
diff --git a/contrib/devtools/build_cmake.sh b/contrib/devtools/build_cmake.sh
--- a/contrib/devtools/build_cmake.sh
+++ b/contrib/devtools/build_cmake.sh
@@ -62,7 +62,7 @@
   esac
 done
 
-cmake -GNinja .. "${CMAKE_FLAGS[@]}"
+cmake -GNinja "${TOPLEVEL}" "${CMAKE_FLAGS[@]}"
 
 # If valid targets are given, use them, otherwise default to "all".
 if [ ${#TARGETS[@]} -eq 0 ]; then