diff --git a/var/spack/repos/builtin/packages/environment-modules/package.py b/var/spack/repos/builtin/packages/environment-modules/package.py
index 9a6888d50a5..7bc1db80478 100644
--- a/var/spack/repos/builtin/packages/environment-modules/package.py
+++ b/var/spack/repos/builtin/packages/environment-modules/package.py
@@ -57,6 +57,8 @@ def install(self, spec, prefix):
 
         config_args = [
             "--prefix=" + prefix,
+            # It looks for tclConfig.sh
+            "--with-tcl=" + tcl.libs.directories[0],
             '--datarootdir=' + prefix.share
         ]
 
@@ -117,8 +119,6 @@ def install(self, spec, prefix):
             config_args.extend([
                 "--without-tclx",
                 "--with-tclx-ver=0.0",
-                # It looks for tclConfig.sh
-                "--with-tcl=" + tcl.libs.directories[0],
                 "--with-tcl-ver={0}".format(tcl.version.up_to(2)),
                 '--disable-versioning'
             ])