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-rw-r--r--gnu/packages/engineering.scm4
1 files changed, 2 insertions, 2 deletions
diff --git a/gnu/packages/engineering.scm b/gnu/packages/engineering.scm
index 169d912c35..d1626f0342 100644
--- a/gnu/packages/engineering.scm
+++ b/gnu/packages/engineering.scm
@@ -1546,7 +1546,7 @@ unique design feature of Trilinos is its focus on packages.")
      `(#:tests? #f
        #:configure-flags
        (list
-        "CXXFLAGS=-O3 -std=c++11"
+        "CXXFLAGS=-O3"
         (string-append "ARCHDIR="
                        (assoc-ref %build-inputs "trilinos")))))
     (native-inputs
@@ -1586,7 +1586,7 @@ parallel computing platforms.  It also supports serial execution.")
     (arguments
      `(,@(substitute-keyword-arguments (package-arguments xyce-serial)
            ((#:configure-flags flags)
-            `(list "CXXFLAGS=-O3 -std=c++11"
+            `(list "CXXFLAGS=-O3"
                    "CXX=mpiCC"
                    "CC=mpicc"
                    "F77=mpif77"