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-rw-r--r--lib/spack/spack/concretize.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/spack/spack/concretize.py b/lib/spack/spack/concretize.py
index f38afd38dc..1c451296c6 100644
--- a/lib/spack/spack/concretize.py
+++ b/lib/spack/spack/concretize.py
@@ -302,10 +302,10 @@ class DefaultConcretizer(object):
raise UnavailableCompilerVersionError(other_compiler)
# copy concrete version into other_compiler
- index = len(matches)-1
+ index = 0
while not _proper_compiler_style(matches[index], spec.architecture):
- index -= 1
- if index == 0:
+ index += 1
+ if index == len(matches) - 1:
raise NoValidVersionError(spec)
spec.compiler = matches[index].copy()
assert(spec.compiler.concrete)