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-rw-r--r--var/spack/packages/python/package.py5
1 files changed, 3 insertions, 2 deletions
diff --git a/var/spack/packages/python/package.py b/var/spack/packages/python/package.py
index fb875a7eeb..705d002e80 100644
--- a/var/spack/packages/python/package.py
+++ b/var/spack/packages/python/package.py
@@ -155,5 +155,6 @@ class Python(Package):
super(Python, self).deactivate(ext_pkg, **args)
exts = spack.install_layout.extension_map(self.spec)
- del exts[ext_pkg.name]
- self.write_easy_install_pth(exts)
+ if ext_pkg.name in exts: # Make deactivate idempotent.
+ del exts[ext_pkg.name]
+ self.write_easy_install_pth(exts)