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-rw-r--r--var/spack/repos/builtin/packages/xmlto/package.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/xmlto/package.py b/var/spack/repos/builtin/packages/xmlto/package.py
index dec27de960..ea16a58550 100644
--- a/var/spack/repos/builtin/packages/xmlto/package.py
+++ b/var/spack/repos/builtin/packages/xmlto/package.py
@@ -22,6 +22,7 @@ class Xmlto(AutotoolsPackage):
depends_on("c", type="build") # generated
# FIXME: missing a lot of dependencies
+ depends_on("flex", type=("build"))
depends_on("docbook-xsl", type=("build", "run"))
depends_on("libxml2", type=("build", "run")) # xmllint
depends_on("libxslt", type=("build", "run")) # xsltconf