diff --git a/dev-python/ujson/ujson-5.4.0.ebuild b/dev-python/ujson/ujson-5.4.0.ebuild
index 4b3de22aa5d0d..3c98bbb8b1726 100644
--- a/dev-python/ujson/ujson-5.4.0.ebuild
+++ b/dev-python/ujson/ujson-5.4.0.ebuild
@@ -35,7 +35,7 @@ BDEPEND="
 distutils_enable_tests pytest
 
 src_configure() {
-	export UJSON_BUILD_DC_INCLUDES="/usr/include/double-conversion"
+	export UJSON_BUILD_DC_INCLUDES="${EPREFIX}/usr/include/double-conversion"
 	export UJSON_BUILD_DC_LIBS="-ldouble-conversion"
 	export UJSON_BUILD_NO_STRIP=1
 }
diff --git a/dev-python/ujson/ujson-5.5.0.ebuild b/dev-python/ujson/ujson-5.5.0.ebuild
index 1b35f0d4ffe61..ca2f1fe67e949 100644
--- a/dev-python/ujson/ujson-5.5.0.ebuild
+++ b/dev-python/ujson/ujson-5.5.0.ebuild
@@ -35,7 +35,7 @@ BDEPEND="
 distutils_enable_tests pytest
 
 src_configure() {
-	export UJSON_BUILD_DC_INCLUDES="/usr/include/double-conversion"
+	export UJSON_BUILD_DC_INCLUDES="${EPREFIX}/usr/include/double-conversion"
 	export UJSON_BUILD_DC_LIBS="-ldouble-conversion"
 	export UJSON_BUILD_NO_STRIP=1
 }