diff --git a/spack.sh b/spack.sh
index 4bc44a1b567426f28d17aea1fb21e4c3a693afe6..1def8a2248e8fcf04dad06e2abaffe91ee75da7d 100644
--- a/spack.sh
+++ b/spack.sh
@@ -26,6 +26,7 @@ c07ddf83c32b7129247fe90eed486dd844047087
 7a0c4e8017033430e5f15ed628be6b539e935ba9
 48fcfda1e7c1781cab4cada6d099823b263ab0cc
 8c29e90fa9962f4a44f39f47217b46c85176af28
+1255620a14afa3ad4aad681a847a3a1704141976
 ---
 ## Ref: https://github.com/spack/spack/commit/[hash]
 ## [hash]: [description]
@@ -47,3 +48,4 @@ c07ddf83c32b7129247fe90eed486dd844047087
 ## 7a0c4e8017033430e5f15ed628be6b539e935ba9: acts: new versions 31.*
 ## 48fcfda1e7c1781cab4cada6d099823b263ab0cc: setup-env.sh: if exe contains qemu, use /proc/$$/comm instead
 ## 8c29e90fa9962f4a44f39f47217b46c85176af28: Build cache: make signed/unsigned a mirror property
+## 1255620a14afa3ad4aad681a847a3a1704141976: Fix infinite recursion when computing concretization errors