diff --git a/src/aero/aero.jl b/src/aero/aero.jl
index 1e4fe217..76ded51b 100644
--- a/src/aero/aero.jl
+++ b/src/aero/aero.jl
@@ -38,12 +38,9 @@ include("airfoil.jl")
 include("airtable.jl")
 include("airfun.jl")
 
-__abs_path_prefix__ = dirname(@__DIR__)
-airfoil_data = joinpath(__abs_path_prefix__,"airfoil_data/C.air")
-
+airfoil_data = joinpath(__TASOPTroot__,"airfoil_data/C.air")
 airsection = airtable(airfoil_data);
 
-
 include("surfcd.jl")
 include("surfcm.jl")
 include("wingpo.jl")
diff --git a/src/misc/materials.jl b/src/misc/materials.jl
index e2a26b50..b1b6c994 100644
--- a/src/misc/materials.jl
+++ b/src/misc/materials.jl
@@ -1,7 +1,7 @@
 using TOML, DocStringExtensions
 
-__abs_path_prefix__ = dirname(@__DIR__)
-MaterialProperties = TOML.parsefile(joinpath(__abs_path_prefix__,"material_data/MaterialProperties.toml"))
+filepath = joinpath(__TASOPTroot__,"material_data/MaterialProperties.toml")
+MaterialProperties = TOML.parsefile(filepath)
 
 """
 $TYPEDEF