diff --git a/generate_source_tarball.sh b/generate_source_tarball.sh
index 3fcdbfa..2132d89 100755
--- a/generate_source_tarball.sh
+++ b/generate_source_tarball.sh
@@ -202,9 +202,6 @@ else
     popd
 fi
 pushd "${FILE_NAME_ROOT}"
-    EA_PART="$(git tag --contains "${VERSION}" \
-                   | grep --quiet '\-ga$' || echo '-ea')"
-
     # Generate .src-rev so build has knowledge of the revision the tarball was
     # created from
     mkdir build
@@ -241,6 +238,9 @@ pushd "${FILE_NAME_ROOT}"
     else
         SWITCH=czf
     fi
+    EA_PART="$(awk -F= \
+               '/^DEFAULT_PROMOTED_VERSION_PRE/ { if ($2) print "-"$2 }' \
+               "${VERSION}"/make/conf/version-numbers.conf)"
     TARBALL_NAME=${FILE_NAME_ROOT}${EA_PART}.tar.${COMPRESSION}
     XZ_OPT=${XZ_OPT-"-T0"} \
           tar --mtime="${TAR_TIME}" --owner=root --group=root --sort=name \
diff --git a/java-17-openjdk.spec b/java-17-openjdk.spec
index 99cbce2..18fe123 100644
--- a/java-17-openjdk.spec
+++ b/java-17-openjdk.spec
@@ -2492,6 +2492,7 @@ require "copy_jdk_configs.lua"
 - Explain patchN syntax situation in a comment
 - generate_source_tarball.sh: Fix whitespace
 - generate_source_tarball.sh: Skip -ga tags
+- generate_source_tarball.sh: Get -ea suffix from version-numbers.conf
 - Related: RHEL-27133
 
 * Thu Jan 11 2024 Andrew Hughes <gnu.andrew@redhat.com> - 1:17.0.10.0.7-2