diff --git a/github.pkg b/github.pkg
index 663836d..86e82b1 100644
--- a/github.pkg
+++ b/github.pkg
@@ -1,9 +1,9 @@
-v 2.0.0
+v 2.0.5
 d 'GITHUB': github package manager
 d 
 d search, install, and manage github packages
 d 
-d Distribution-Date:   20190531
+d Distribution-Date:   20200113
 d License: MIT
 d 
 F abspath.ado
@@ -15,6 +15,7 @@ F github.ado
 F github.dlg
 F github.sthlp
 F githubcheck.ado
+F githubcheckfilename.ado
 F githubconfirm.ado
 F githubdb.ado
 F githubdependency.ado
@@ -29,7 +30,3 @@ F githuboutput.ado
 F githubquery.ado
 F githubsearch.ado
 F githubsearchsteps.ado
-F make.ado
-F make.dlg
-F make.sthlp
-F makedlg.ado
diff --git a/githubcheckfilename.ado b/githubcheckfilename.ado
new file mode 100644
index 0000000..04b6f44
--- /dev/null
+++ b/githubcheckfilename.ado
@@ -0,0 +1,20 @@
+*cap prog drop githubcheckfilename
+
+program githubcheckfilename
+	
+  version 13
+
+  syntax anything [, filename(str)]
+
+  //check whether the filename exists in other packages
+  preserve
+  sysuse githubfiles.dta, clear
+  qui gen found = strpos(file, "`filename'")
+  qui keep if found == 1 & packagename != `anything'
+  local N = _N
+  if `N' > 0 {
+	di as err "{bf:`filename'} is used elsewhere. try: {stata github findfile `filename'}"
+  }
+  restore
+
+end 
diff --git a/githubfiles.dta b/githubfiles.dta
index a563435..8368167 100644
Binary files a/githubfiles.dta and b/githubfiles.dta differ
diff --git a/make.ado b/make.ado
index be1175b..defc048 100644
--- a/make.ado
+++ b/make.ado
@@ -210,6 +210,9 @@ prog make
 		forval m = 1/`start' {
 		  local n : di files[`m']
 		  file write `pkgfile' `"F `n'"' _n
+		  
+		  //check whether the file is unique
+		  githubcheckfilename "`anything'", filename("`n'")
 		}
 		restore
 	}
@@ -219,6 +222,9 @@ prog make
 		while !missing("`1'") {
 				if "`1'" != ";" {
 				file write `pkgfile' `"f `1'"' _n
+				
+				//check whether the file is unique
+		        githubcheckfilename "`anything'", filename("`n'")
 			}
 			macro shift
 		}
diff --git a/make.do b/make.do
index 9183bc7..96a182f 100644
--- a/make.do
+++ b/make.do
@@ -17,7 +17,7 @@ make github, replace toc pkg  version(2.0.5)                             ///
 		 "githubdb.ado;githubdependency.ado;githubfiles.dta;"                ///
 		 "githubhot.ado;githublistpack.ado;githublistpack.sthlp;"            ///
 		 "githuboutput.ado;githubquery.ado;githubsearch.ado;"                ///
-		 "githubmake.ado;githubsearchsteps.ado;")                            ///
+		 "githubmake.ado;githubsearchsteps.ado;githubcheckfilename.ado")     ///
      ancillary("")                                                  
 
 
diff --git a/stata.toc b/stata.toc
index 6a62aa7..6e8d5e9 100644
--- a/stata.toc
+++ b/stata.toc
@@ -1,4 +1,4 @@
-v 2.0.0
+v 2.0.5
 d Materials by E. F. Haghish
 d University of Göttingen
 d haghish@med.uni-goettingen.de