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-rw-r--r--gnu/packages/bioinformatics.scm2
1 files changed, 1 insertions, 1 deletions
diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index 74646cc4a8..b1913dcaa3 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -11090,7 +11090,7 @@ matplotlib.use('Agg')
" line)))
;; Make sure GESS has all modules in its path
(wrap-program (string-append target "GESS.py")
- `("PYTHONPATH" ":" prefix (,target ,(getenv "PYTHONPATH"))))
+ `("PYTHONPATH" ":" = (,target ,(getenv "PYTHONPATH"))))
(mkdir-p bin)
(symlink (string-append target "GESS.py")
(string-append bin "GESS.py"))