diff --git a/circle.yml b/circle.yml
index 64f1bf4a..5340f021 100644
--- a/circle.yml
+++ b/circle.yml
@@ -15,20 +15,17 @@ job: &JOB
       - ~/.cargo/registry/index
   - run: echo "${LIBRARY}-${VERSION}-${TARGET}" > ~/lib_key
   - restore_cache:
-      key: lib-{{ checksum "~/lib_key" }}-{{ checksum "test/build_openssl.sh"}}
+      key: lib-{{ checksum "~/lib_key" }}-{{ checksum "test/build_openssl.sh" }}
   - run: ./test/build_openssl.sh
   - save_cache:
-      key: lib-{{ checksum "~/lib_key" }}-{{ checksum "test/build_openssl.sh"}}
+      key: lib-{{ checksum "~/lib_key" }}-{{ checksum "test/build_openssl.sh" }}
       paths:
-      - ~/openssl
+      - /openssl
   - restore_cache:
       key: deps-1.19.0-{{ checksum "Cargo.lock" }}-{{ checksum "~/lib_key" }}
-  - run: |
-      export OPENSSL_DIR=$HOME/openssl
-      cargo run --manifest-path=systest/Cargo.toml --target $TARGET
+  - run: cargo run --manifest-path=systest/Cargo.toml --target $TARGET
   - run: |
       ulimit -c unlimited
-      export OPENSSL_DIR=$HOME/openssl
       export PATH=$OPENSSL_DIR/bin:$PATH
       if [ "${NO_RUN}" = "1" ]; then
         TEST_ARGS=--no-run
@@ -81,6 +78,7 @@ armhf: &ARMHF
 
 base: &BASE
   RUST_BACKTRACE: 1
+  OPENSSL_DIR: /openssl
 
 version: 2
 jobs:
diff --git a/test/build_openssl.sh b/test/build_openssl.sh
index 3decd937..67a0d804 100755
--- a/test/build_openssl.sh
+++ b/test/build_openssl.sh
@@ -43,13 +43,12 @@ curl -o ${OUT} -L --max-redirs ${MAX_REDIRECTS} ${URL1} \
 
 tar --strip-components=1 -xzf ${OUT}
 
-PREFIX=${HOME}/openssl
 case "${LIBRARY}" in
 "openssl")
-    ./Configure --prefix=${PREFIX} ${OS_COMPILER} -fPIC -g ${OS_FLAGS} no-shared
+    ./Configure --prefix=${OPENSSL_DIR} ${OS_COMPILER} -fPIC -g ${OS_FLAGS} no-shared
     ;;
 "libressl")
-    ./configure --prefix=${PREFIX} --disable-shared --with-pic
+    ./configure --prefix=${OPENSSL_DIR} --disable-shared --with-pic
     ;;
 esac