diff --git a/tests/common/config.sh b/tests/common/config.sh
index a2f8df03..926cdae5 100644
--- a/tests/common/config.sh
+++ b/tests/common/config.sh
@@ -2,14 +2,16 @@
 
 set -e
 
-build_path=$(pwd)
-while [ "${build_path}" != "/" -a ! -e "${build_path}/.git" ]; do
-	build_path=$(dirname ${build_path})
-done
-if [ ! -e "${build_path}/.git" ]; then
-	echo "Not inside git directory" 1>&2
-	exit 1
+if [ -n "${BUILD_BASE_DIR}" ]; then
+    build_path="${BUILD_BASE_DIR}"
+else
+    build_path=$(git rev-parse --show-toplevel)
 fi
+if [ -z "${build_path}" ]; then
+    echo "Failed to find build base path"
+    exit 1
+fi
+export build_path
 
 # Save the configuration files in tmp.
 save_config ()
diff --git a/tests/libsubid/04_nss/Makefile b/tests/libsubid/04_nss/Makefile
index dd5acf72..79c2fc9d 100644
--- a/tests/libsubid/04_nss/Makefile
+++ b/tests/libsubid/04_nss/Makefile
@@ -1,12 +1,15 @@
 all: test_nss libsubid_zzz.so
 
-test_nss: test_nss.c ../../../lib/nss.c
-	gcc -c -I../../../lib/ -I../../.. -o test_nss.o test_nss.c
-	gcc -o test_nss test_nss.o ../../../lib/.libs/libshadow.a -ldl
+BASE_TEST_DIR ?= $(shell git rev-parse --show-toplevel)
+basedir := $(BASE_TEST_DIR)
+
+test_nss: test_nss.c $(basedir)/lib/nss.c
+	gcc -c -I$(basedir)/lib/ -I$(basedir)-o test_nss.o test_nss.c
+	gcc -o test_nss test_nss.o $(basedir)/lib/.libs/libshadow.a -ldl
 
 libsubid_zzz.so: libsubid_zzz.c
-	gcc -c -I../../../lib/ -I../../.. -I../../../libsubid libsubid_zzz.c
-	gcc -L../../../libsubid -shared -o libsubid_zzz.so libsubid_zzz.o ../../../lib/.libs/libshadow.a -ldl
+	gcc -c -I$(basedir)/lib/ -I$(basedir) -I$(basedir)/libsubid libsubid_zzz.c
+	gcc -L$(basedir)/libsubid -shared -o libsubid_zzz.so libsubid_zzz.o $(basedir)/lib/.libs/libshadow.a -ldl
 
 clean:
 	rm -f *.o *.so test_nss
diff --git a/tests/libsubid/04_nss/subidnss.test b/tests/libsubid/04_nss/subidnss.test
index 3d40dc8c..400171fa 100755
--- a/tests/libsubid/04_nss/subidnss.test
+++ b/tests/libsubid/04_nss/subidnss.test
@@ -9,7 +9,7 @@ cd $(dirname $0)
 
 make
 
-export LD_LIBRARY_PATH=.:../../../lib/.libs:$LD_LIBRARY_PATH
+export LD_LIBRARY_PATH=.:${build_path}/lib/.libs:$LD_LIBRARY_PATH
 
 ./test_nss 1
 ./test_nss 2
diff --git a/tests/libsubid/04_nss/test_range b/tests/libsubid/04_nss/test_range
index ee25080f..45a791c7 100755
--- a/tests/libsubid/04_nss/test_range
+++ b/tests/libsubid/04_nss/test_range
@@ -11,23 +11,23 @@ cleanup1() {
     umount /etc/nsswitch.conf
 }
 trap cleanup1 EXIT HUP INT TERM
-../../../src/check_subid_range user1 u 100000 65535
+${build_path}/src/check_subid_range user1 u 100000 65535
 if [ $? -ne 0 ]; then
     exit 1
 fi
-../../../src/check_subid_range user2 u 100000 65535
+${build_path}/src/check_subid_range user2 u 100000 65535
 if [ $? -eq 0 ]; then
     exit 1
 fi
-../../../src/check_subid_range unknown u 100000 65535
+${build_path}/src/check_subid_range unknown u 100000 65535
 if [ $? -eq 0 ]; then
     exit 1
 fi
-../../../src/check_subid_range error u 100000 65535
+${build_path}/src/check_subid_range error u 100000 65535
 if [ $? -eq 0 ]; then
     exit 1
 fi
-../../../src/check_subid_range user1 u 1000 65535
+${build_path}/src/check_subid_range user1 u 1000 65535
 if [ $? -eq 0 ]; then
     exit 1
 fi
@@ -43,7 +43,7 @@ cleanup2() {
     umount /etc/nsswitch.conf
 }
 trap cleanup2 EXIT HUP INT TERM
-../../../src/check_subid_range user1 u 100000 65535
+${build_path}/src/check_subid_range user1 u 100000 65535
 if [ $? -eq 0 ]; then
     exit 1
 fi