diff --git a/meta-oe/recipes-connectivity/ace/ace_8.0.2.bb b/meta-oe/recipes-connectivity/ace/ace_8.0.2.bb
index 0fe41a7b92..b730b0a86c 100644
--- a/meta-oe/recipes-connectivity/ace/ace_8.0.2.bb
+++ b/meta-oe/recipes-connectivity/ace/ace_8.0.2.bb
@@ -21,13 +21,13 @@ CVE_STATUS[CVE-2009-1147] = "cpe-incorrect: this CVE is for vmware ace"
 COMPATIBLE_HOST:libc-musl = "null"
 
 S = "${UNPACKDIR}/ACE_wrappers"
-B = "${WORKDIR}/ACE_wrappers/ace"
-export ACE_ROOT = "${WORKDIR}/ACE_wrappers"
+B = "${UNPACKDIR}/ACE_wrappers/ace"
+export ACE_ROOT = "${UNPACKDIR}/ACE_wrappers"
 
 inherit pkgconfig
 
 CXXFLAGS:append = " -fpermissive -Wnodeprecated-declarations"
-CXX:append = " -ffile-prefix-map=${WORKDIR}= "
+CXX:append = " -ffile-prefix-map=${UNPACKDIR}= "
 EXTRA_OEMAKE += "INSTALL_LIB=${baselib} install_rpath=0"
 
 do_install() {