diff --git a/var/spack/repos/builtin/packages/nextflow/package.py b/var/spack/repos/builtin/packages/nextflow/package.py
index a91badd5edc..865534c2f80 100644
--- a/var/spack/repos/builtin/packages/nextflow/package.py
+++ b/var/spack/repos/builtin/packages/nextflow/package.py
@@ -42,4 +42,4 @@ def unpack(self):
     def install(self, spec, prefix):
         mkdirp(prefix.bin)
         install("nextflow", join_path(prefix.bin, "nextflow"))
-        set_executable( join_path(prefix.bin, "nextflow"))
+        set_executable(join_path(prefix.bin, "nextflow"))