2 files changed, 8 insertions(+), 9 deletions(-)

M gnu/packages/julia.scm
M gnu/packages/patches/julia-allow-parallel-build.patch

@@ 315,11 315,8 @@ libraries.  It is also a bit like @code{ldd} and @code{otool -L}.")
                (substitute* (jlpath "Zlib")
                  (((from "libz")) (to "zlib" "libz"))))))
          (add-after 'unpack 'enable-parallel-tests
-           ;; FIXME: julia fails at networking in the container and falls back
-           ;; to a single worker, which causes the tests to not run in
-           ;; parallel (see: https://github.com/JuliaLang/julia/issues/43205).
-           (lambda* (#:key parallel-build? #:allow-other-keys)
-             (setenv "JULIA_CPU_THREADS" (if parallel-build?
+           (lambda* (#:key parallel-tests? #:allow-other-keys)
+             (setenv "JULIA_CPU_THREADS" (if parallel-tests?
                                              (number->string (parallel-job-count))
                                              "1"))
              (format #t "JULIA_CPU_THREADS environment variable set to ~a~%"

@@ 1,3 1,8 @@
+Allow parallel tests with isolated environment.
+
+See https://github.com/JuliaLang/julia/issues/43205 and
+https://github.com/JuliaLang/julia/pull/43211.
+
 diff --git a/test/runtests.jl b/test/runtests.jl
 index 2f9cd058bb..150395e78c 100644
 --- a/test/runtests.jl


@@ 11,14 16,11 @@ index 2f9cd058bb..150395e78c 100644
  using Base: Experimental
  
  include("choosetests.jl")
-@@ -83,11 +83,15 @@ prepend!(tests, linalg_tests)
+@@ -83,11 +83,12 @@ prepend!(tests, linalg_tests)
  import LinearAlgebra
  cd(@__DIR__) do
      n = 1
 -    if net_on
-+    # Allow parallel tests with isolated environment
-+    # https://github.com/JuliaLang/julia/issues/43205
-+    # https://github.com/JuliaLang/julia/pull/43211
 +    if net_on || haskey(ENV, "JULIA_CPU_THREADS")
          n = min(Sys.CPU_THREADS, length(tests))
          n > 1 && addprocs_with_testenv(n)