diff --git a/gnu/packages/engineering.scm b/gnu/packages/engineering.scm
index 42f5544a54..e0fe0f354f 100644
--- a/gnu/packages/engineering.scm
+++ b/gnu/packages/engineering.scm
@@ -2961,6 +2961,10 @@ (define-public xfoil
              (with-directory-excursion "orrs"
                (invoke "bin/osgen" "osmaps_ns.lst"))
              (invoke "make" "-C" "plotlib")
+             (substitute* "bin/Makefile_gfortran"
+               (("^FFLAGS =(.*)$" _ suffix)
+                (string-append "FFLAGS = -fallow-argument-mismatch "
+                               suffix "\n")))
              (invoke "make" "-C" "bin" "-f" "Makefile_gfortran")))
          (replace 'install
            (lambda* (#:key outputs #:allow-other-keys)
@@ -2976,9 +2980,9 @@ (define-public xfoil
                (install-file "xfoil_doc.txt" doc-dir)))))
        #:tests? #f))
     (inputs
-     `(("libx11" ,libx11)))
+     (list libx11))
     (native-inputs
-     `(("gfortran" ,gfortran)))
+     (list gfortran))
     (home-page "https://web.mit.edu/drela/Public/web/xfoil/")
     (synopsis "Program for the design and analysis of subsonic airfoils")
     (description