diff --git a/var/spack/repos/builtin/packages/eagle/package.py b/var/spack/repos/builtin/packages/eagle/package.py
index 81e0be6f903d09a739f2b11306081a8a7c5dd52d..0509f32cd44e2bde4d4cc0ab96ffe26da18abf15 100644
--- a/var/spack/repos/builtin/packages/eagle/package.py
+++ b/var/spack/repos/builtin/packages/eagle/package.py
@@ -33,6 +33,13 @@ def edit(self, spec, prefix):
         # add htslib link to ldflags
         filter_file('-lcurl', '-lcurl -lhts', 'Makefile', string=True)
 
+        # use spack C compiler
+        filter_file('CC=.*', 'CC={0}'.format(spack_cc), 'Makefile')
+
+        # remove march=native %fj
+        if self.spec.satisfies('%fj'):
+            filter_file('-march=native', '', 'Makefile', string=True)
+
     def install(self, spec, prefix):
         mkdirp(prefix.bin)