diff --git a/src/cmd_fetch.zig b/src/cmd_fetch.zig
index bac4a09ea5485ef7a47cbda4e98bdbc9a9760737..03b96181d33ec647c768f29a94a92b4e415a4f71 100644
--- a/src/cmd_fetch.zig
+++ b/src/cmd_fetch.zig
@@ -127,7 +127,7 @@ fn fetch_deps(dir: []const u8, mpath: []const u8) anyerror!u.Module {
                         if (d.c_include_dirs.len > 0 or d.c_source_files.len > 0) {
                             var mod_from = try u.Module.from(d);
                             mod_from.clean_path = u.trim_prefix(moddir, dir)[1..];
-                            try moduledeps.append(mod_from);
+                            if (mod_from.is_for_this()) try moduledeps.append(mod_from);
                         }
                         break :blk;
                     },
@@ -140,8 +140,10 @@ fn fetch_deps(dir: []const u8, mpath: []const u8) anyerror!u.Module {
                 if (d.c_include_dirs.len > 0) dd.c_include_dirs = d.c_include_dirs;
                 if (d.c_source_flags.len > 0) dd.c_source_flags = d.c_source_flags;
                 if (d.c_source_files.len > 0) dd.c_source_files = d.c_source_files;
+                if (d.only_os.len > 0) dd.only_os = d.only_os;
+                if (d.except_os.len > 0) dd.except_os = d.except_os;
 
-                try moduledeps.append(dd);
+                if (dd.is_for_this()) try moduledeps.append(dd);
             },
         }
     }
@@ -153,6 +155,8 @@ fn fetch_deps(dir: []const u8, mpath: []const u8) anyerror!u.Module {
         .c_source_files = m.c_source_files,
         .deps = moduledeps.items,
         .clean_path = "",
+        .only_os = &[_][]const u8{},
+        .except_os = &[_][]const u8{},
     };
 }
 
diff --git a/src/common.zig b/src/common.zig
index d2f8b0514cb699640db73645293bc494447474b0..681a64a7c33915dfb99e53e9d0fb381a5b505928 100644
--- a/src/common.zig
+++ b/src/common.zig
@@ -27,7 +27,7 @@ pub fn collect_deps(dir: []const u8, mpath: []const u8) anyerror!u.Module {
                         if (d.c_include_dirs.len > 0 or d.c_source_files.len > 0) {
                             var mod_from = try u.Module.from(d);
                             mod_from.clean_path = u.trim_prefix(moddir, dir)[1..];
-                            try moduledeps.append(mod_from);
+                            if (mod_from.is_for_this()) try moduledeps.append(mod_from);
                         }
                         break :blk;
                     },
@@ -40,8 +40,10 @@ pub fn collect_deps(dir: []const u8, mpath: []const u8) anyerror!u.Module {
                 if (d.c_include_dirs.len > 0) dd.c_include_dirs = d.c_include_dirs;
                 if (d.c_source_flags.len > 0) dd.c_source_flags = d.c_source_flags;
                 if (d.c_source_files.len > 0) dd.c_source_files = d.c_source_files;
+                if (d.only_os.len > 0) dd.only_os = d.only_os;
+                if (d.except_os.len > 0) dd.except_os = d.except_os;
 
-                try moduledeps.append(dd);
+                if (dd.is_for_this()) try moduledeps.append(dd);
             },
         }
     }
@@ -53,5 +55,7 @@ pub fn collect_deps(dir: []const u8, mpath: []const u8) anyerror!u.Module {
         .c_source_files = m.c_source_files,
         .deps = moduledeps.items,
         .clean_path = "",
+        .only_os = &[_][]const u8{},
+        .except_os = &[_][]const u8{},
     };
 }
diff --git a/src/util/dep.zig b/src/util/dep.zig
index 3ef78a8808ad7d63edb83c3d88eb9afa1aaf8fd1..dd68a070abae62f59c47700f9d54e920cc8b644f 100644
--- a/src/util/dep.zig
+++ b/src/util/dep.zig
@@ -18,6 +18,8 @@ pub const Dep = struct {
     c_include_dirs: [][]const u8,
     c_source_flags: [][]const u8,
     c_source_files: [][]const u8,
+    only_os: [][]const u8,
+    except_os: [][]const u8,
 
     pub fn clean_path(self: Dep) ![]const u8 {
         var p = self.path;
diff --git a/src/util/funcs.zig b/src/util/funcs.zig
index 5d47afade8e229f04349bdda2c4c954cdb3e2a6b..bdc0706d8e0cb755ee503048c172a5f3972a93bc 100644
--- a/src/util/funcs.zig
+++ b/src/util/funcs.zig
@@ -156,3 +156,13 @@ pub fn run_cmd(dir: ?[]const u8, args: []const []const u8) !u32 {
     };
     return result.term.Exited;
 }
+
+pub fn list_remove(input: [][]const u8, search: []const u8) ![][]const u8 {
+    const list = &std.ArrayList([]const u8).init(gpa);
+    for (input) |item| {
+        if (!std.mem.eql(u8, item, search)) {
+            try list.append(item);
+        }
+    }
+    return list.items;
+}
diff --git a/src/util/modfile.zig b/src/util/modfile.zig
index 31511056a6333535d391e2680233d71fa39f2d47..62ab2cbc45154cfab8085dba230c1dc89d27c2a6 100644
--- a/src/util/modfile.zig
+++ b/src/util/modfile.zig
@@ -49,6 +49,8 @@ pub const ModFile = struct {
                         .c_include_dirs = try item.mapping.get_string_array(alloc, "c_include_dirs"),
                         .c_source_flags = try item.mapping.get_string_array(alloc, "c_source_flags"),
                         .c_source_files = try item.mapping.get_string_array(alloc, "c_source_files"),
+                        .only_os = try u.list_remove(try u.split(item.mapping.get_string("only_os"), ","), ""),
+                        .except_os = try u.list_remove(try u.split(item.mapping.get_string("except_os"), ","), ""),
                     });
                 }
             }
diff --git a/src/util/module.zig b/src/util/module.zig
index 29bb07286155968f0f1ab7b85b860426bb45a704..05b6dd0760fe978c53098a7dc749d6dd6fb96789 100644
--- a/src/util/module.zig
+++ b/src/util/module.zig
@@ -1,5 +1,6 @@
 const std = @import("std");
 const gpa = std.heap.c_allocator;
+const builtin = @import("builtin");
 
 const u = @import("index.zig");
 
@@ -16,6 +17,8 @@ pub const Module = struct {
     c_include_dirs: [][]const u8,
     c_source_flags: [][]const u8,
     c_source_files: [][]const u8,
+    only_os: [][]const u8,
+    except_os: [][]const u8,
 
     deps: []Module,
     clean_path: []const u8,
@@ -29,6 +32,8 @@ pub const Module = struct {
             .c_source_files = dep.c_source_files,
             .deps = &[_]Module{},
             .clean_path = try dep.clean_path(),
+            .only_os = dep.only_os,
+            .except_os = dep.except_os,
         };
     }
 
@@ -67,4 +72,15 @@ pub const Module = struct {
         const hex = try std.fmt.allocPrint(gpa, "{x}", .{out});
         return hex;
     }
+
+    pub fn is_for_this(self: Module) bool {
+        const os = @tagName(builtin.os.tag);
+        if (self.only_os.len > 0) {
+            return u.list_contains(self.only_os, os);
+        }
+        if (self.except_os.len > 0) {
+            return !u.list_contains(self.except_os, os);
+        }
+        return true;
+    }
 };