diff --git a/prob/torus_cbc/build.py b/prob/torus_cbc/build.py
index 7dd9fe8..417de67 100644
--- a/prob/torus_cbc/build.py
+++ b/prob/torus_cbc/build.py
@@ -116,8 +116,11 @@
 if FORTRAN:
     OPACPATH = "opacity.SFHo.nohoro.juo.brem1.bin"
 else:
-    #OPACPATH = "opacity.SFHo.nohoro.juo.brem1.h5"
-    OPACPATH = "NuLib_rho70_temp62_ye50_ng61_ns4_version1.0_20241120_bhlight.h5"
+    if OSCILLATIONS:
+        OPACPATH = "NuLib_rho70_temp62_ye50_ng61_ns4_version1.0_20241120_bhlight.h5"
+    else:
+        OPACPATH = "opacity.SFHo.nohoro.juo.brem1.h5"
+
 OPACPARAM = "opacbin.LS220.evan.param"
 OPACPATH = "../../data/"+OPACPATH
 OPACPARAM = "../../data/"+OPACPARAM