diff --git a/Cargo.lock b/Cargo.lock
index 577ccb4..dfe2a81 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -62,12 +62,6 @@ version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b0674a1ddeecb70197781e945de4b3b8ffb61fa939a5597bcf48503737663100"
 
-[[package]]
-name = "arrayvec"
-version = "0.7.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
-
 [[package]]
 name = "ascii"
 version = "1.1.0"
@@ -76,9 +70,9 @@ checksum = "d92bec98840b8f03a5ff5413de5293bfcd8bf96467cf5452609f939ec6f5de16"
 
 [[package]]
 name = "ast_node"
-version = "3.0.3"
+version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1e2cddd48eafd883890770673b1971faceaf80a185445671abc3ea0c00593ee"
+checksum = "2eb025ef00a6da925cf40870b9c8d008526b6004ece399cb0974209720f0b194"
 dependencies = [
  "quote",
  "swc_macros_common",
@@ -493,9 +487,9 @@ dependencies = [
 
 [[package]]
 name = "deno_ast"
-version = "0.50.0"
+version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b80d223f51fb001a4100116ec14588d3798caca62e0c42cde7f91ef7c14c5925"
+checksum = "30c2f6f65154faed61e45d6578566f9fab9d2a330c35c87366706883701cce51"
 dependencies = [
  "base64 0.22.1",
  "capacity_builder",
@@ -529,7 +523,7 @@ dependencies = [
  "swc_visit",
  "text_lines",
  "thiserror",
- "unicode-width 0.2.1",
+ "unicode-width",
  "url",
 ]
 
@@ -559,9 +553,9 @@ dependencies = [
 
 [[package]]
 name = "deno_graph"
-version = "0.103.0"
+version = "0.104.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2594e83855f172895f0e391099ca5d09dc8ae1072789c7e9ed3c3dc52a267dc6"
+checksum = "166b59d27d3ef8a446bece020e1d72b629250a0cb6665b0c7929cd7bae93b9a1"
 dependencies = [
  "async-trait",
  "boxed_error",
@@ -606,9 +600,9 @@ dependencies = [
 
 [[package]]
 name = "deno_media_type"
-version = "0.2.9"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0ec0dada9dc5ac4733b4175d36f6a150b7dd68fab46db35cb1ef00dd7366acb"
+checksum = "9fd0af4161f90b092feb363864a64d7c74e0efc13a15905d0d09df73bb72a123"
 dependencies = [
  "data-url",
  "encoding_rs",
@@ -718,9 +712,9 @@ dependencies = [
 
 [[package]]
 name = "dprint-swc-ext"
-version = "0.25.0"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48928f46665a21bca006dc9a02d1329143ef161f7347f2b9430b55519275db8a"
+checksum = "33175ddb7a6d418589cab2966bd14a710b3b1139459d3d5ca9edf783c4833f4c"
 dependencies = [
  "num-bigint",
  "rustc-hash",
@@ -867,9 +861,9 @@ dependencies = [
 
 [[package]]
 name = "from_variant"
-version = "2.0.2"
+version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "308530a56b099da144ebc5d8e179f343ad928fa2b3558d1eb3db9af18d6eff43"
+checksum = "e5ff35a391aef949120a0340d690269b3d9f63460a6106e99bd07b961f345ea9"
 dependencies = [
  "swc_macros_common",
  "syn",
@@ -1090,14 +1084,15 @@ dependencies = [
 
 [[package]]
 name = "hstr"
-version = "2.0.1"
+version = "3.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ced1416104790052518d199e753d49a7d8130d476c664bc9e53f40cfecb8e615"
+checksum = "0c43c0a9e8fbdb3bb9dc8eee85e1e2ac81605418b4c83b6b7413cbf14d56ca5c"
 dependencies = [
  "hashbrown 0.14.5",
  "new_debug_unreachable",
  "once_cell",
  "rustc-hash",
+ "serde",
  "triomphe",
 ]
 
@@ -2082,10 +2077,11 @@ checksum = "1bc711410fbe7399f390ca1c3b60ad0f53f80e95c5eb935e52268a0e2cd49acc"
 
 [[package]]
 name = "serde"
-version = "1.0.219"
+version = "1.0.228"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
 dependencies = [
+ "serde_core",
  "serde_derive",
 ]
 
@@ -2109,11 +2105,20 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_core"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
 [[package]]
 name = "serde_derive"
-version = "1.0.219"
+version = "1.0.228"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b0276cf7f2c73365f7157c8123c21cd9a50fbbd844757af28ca1f5925fc2a00"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2290,9 +2295,9 @@ dependencies = [
 
 [[package]]
 name = "swc_atoms"
-version = "7.0.0"
+version = "9.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3500dcf04c84606b38464561edc5e46f5132201cb3e23cf9613ed4033d6b1bb2"
+checksum = "d4ccbe2ecad10ad7432100f878a107b1d972a8aee83ca53184d00c23a078bb8a"
 dependencies = [
  "hstr",
  "once_cell",
@@ -2301,9 +2306,9 @@ dependencies = [
 
 [[package]]
 name = "swc_common"
-version = "14.0.3"
+version = "17.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63fdb58d278e7cd625f671e5371b3e6c0eab56c6e2a995a6f70dd0f7725255d4"
+checksum = "259b675d633a26d24efe3802a9d88858c918e6e8f062d3222d3aa02d56a2cf4c"
 dependencies = [
  "anyhow",
  "ast_node",
@@ -2322,15 +2327,15 @@ dependencies = [
  "swc_sourcemap",
  "swc_visit",
  "tracing",
- "unicode-width 0.1.14",
+ "unicode-width",
  "url",
 ]
 
 [[package]]
 name = "swc_config"
-version = "3.1.1"
+version = "3.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d94f41e0f3c4c119a06af5e164674b63ae7eb6d7c1c60e46036c4a548f9fbe44"
+checksum = "72e90b52ee734ded867104612218101722ad87ff4cf74fe30383bd244a533f97"
 dependencies = [
  "anyhow",
  "bytes-str",
@@ -2354,9 +2359,9 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_ast"
-version = "15.0.0"
+version = "18.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65c25af97d53cf8aab66a6c68f3418663313fc969ad267fc2a4d19402c329be1"
+checksum = "a573a0c72850dec8d4d8085f152d5778af35a2520c3093b242d2d1d50776da7c"
 dependencies = [
  "bitflags 2.9.3",
  "is-macro",
@@ -2374,9 +2379,9 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_codegen"
-version = "17.0.0"
+version = "20.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b91da8222bd2e868a6977ef402b3ca5c29a41d18cd84772441d9e06ec95ded1f"
+checksum = "ff2a6ee1ec49dda8dedeac54e4147b4e8b3f278d9bb34ab28983257a393d34ed"
 dependencies = [
  "ascii",
  "compact_str",
@@ -2409,15 +2414,13 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_lexer"
-version = "23.0.1"
+version = "26.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67c3bd958a5a67e2cc3f74abdd41fda688e54e7a25b866569260ef7018b67972"
+checksum = "5e82f7747e052c6ff6e111fa4adeb14e33b46ee6e94fe5ef717601f651db48fc"
 dependencies = [
- "arrayvec",
  "bitflags 2.9.3",
  "either",
  "num-bigint",
- "phf",
  "rustc-hash",
  "seq-macro",
  "serde",
@@ -2427,14 +2430,15 @@ dependencies = [
  "swc_atoms",
  "swc_common",
  "swc_ecma_ast",
+ "swc_ecma_parser",
  "tracing",
 ]
 
 [[package]]
 name = "swc_ecma_loader"
-version = "14.0.0"
+version = "17.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c675d14700c92f12585049b22b02356f1e142f4b0c32a4d0eb4b7a968a4c0c1e"
+checksum = "fbcababb48f0d46587a0a854b2c577eb3a56fa99687de558338021e93cd2c8f5"
 dependencies = [
  "anyhow",
  "pathdiff",
@@ -2447,25 +2451,30 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_parser"
-version = "23.0.0"
+version = "27.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9166873bb660bed50b5f422233537d3e946336398570a4a13e57d8c63d6a01c5"
+checksum = "7f1a51af1a92cd4904c073b293e491bbc0918400a45d58227b34c961dd6f52d7"
 dependencies = [
+ "bitflags 2.9.3",
  "either",
  "num-bigint",
+ "phf",
+ "rustc-hash",
+ "seq-macro",
  "serde",
+ "smartstring",
+ "stacker",
  "swc_atoms",
  "swc_common",
  "swc_ecma_ast",
- "swc_ecma_lexer",
  "tracing",
 ]
 
 [[package]]
 name = "swc_ecma_transforms_base"
-version = "25.0.0"
+version = "30.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cc6454e1cf587b1d50509116350b503e7d647dbcc41bb5be9bf9a40fd792037"
+checksum = "250f6f165578ca4fee47bd57585c1b9597c94bf4ea6591df47f2b5fa5b1883fe"
 dependencies = [
  "better_scoped_tls",
  "indexmap",
@@ -2485,9 +2494,9 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_transforms_classes"
-version = "25.0.0"
+version = "30.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c48790332195e4163f1f49713a14f91a5614048ca6638c664050fe577c3fad5a"
+checksum = "3d3ab35eff4a980e02d708798ae4c35bc017612292adbffe7b7b554df772fdf5"
 dependencies = [
  "swc_common",
  "swc_ecma_ast",
@@ -2510,9 +2519,9 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_transforms_proposal"
-version = "25.0.0"
+version = "30.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a1d5b2190c134d9b5c9b4d8c0d4b23b4fb5c433a7ae470f1c2103b8ff99160c"
+checksum = "c2d7748d4112c87ce1885260035e4a43cebfe7661a40174b7d77a0a04760a257"
 dependencies = [
  "either",
  "rustc-hash",
@@ -2528,9 +2537,9 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_transforms_react"
-version = "28.0.0"
+version = "33.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc9a3fe915e9b4e289edc78f060b8edda8633bc44234c5cf167e359befa18267"
+checksum = "03de12e38e47ac1c96ac576f793ad37a9d7b16fbf4f2203881f89152f2498682"
 dependencies = [
  "base64 0.22.1",
  "bytes-str",
@@ -2552,9 +2561,9 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_transforms_typescript"
-version = "28.0.0"
+version = "33.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e62c7ec4f9667b9a85270125443fee6a7c2f357272d3d9eafc75a2f6fb0bca9"
+checksum = "4408800fdeb541fabf3659db622189a0aeb386f57b6103f9294ff19dfde4f7b0"
 dependencies = [
  "bytes-str",
  "rustc-hash",
@@ -2570,9 +2579,9 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_utils"
-version = "21.0.0"
+version = "24.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83259addd99ed4022aa9fc4d39428c008d3d42533769e1a005529da18cde4568"
+checksum = "0fb99e179988cabd473779a4452ab942bcb777176983ca3cbaf22a8f056a65b0"
 dependencies = [
  "indexmap",
  "num_cpus",
@@ -2589,9 +2598,9 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_visit"
-version = "15.0.0"
+version = "18.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75a579aa8f9e212af521588df720ccead079c09fe5c8f61007cf724324aed3a0"
+checksum = "a9611a72a4008d62608547a394e5d72a5245413104db096d95a52368a8cc1d63"
 dependencies = [
  "new_debug_unreachable",
  "num-bigint",
@@ -2934,12 +2943,6 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
 
-[[package]]
-name = "unicode-width"
-version = "0.1.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
-
 [[package]]
 name = "unicode-width"
 version = "0.2.1"
diff --git a/Cargo.toml b/Cargo.toml
index 9249691..a0e159c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,8 +11,8 @@ license = "MIT"
 members = ["lib"]
 
 [workspace.dependencies]
-deno_graph = { version = "0.103.0", default-features = false }
-deno_ast = { version = "0.50.0", features = ["transpiling"] }
+deno_graph = { version = "0.104.0", default-features = false }
+deno_ast = { version = "0.52.0", features = ["transpiling"] }
 import_map = "0.24.0"
 serde = "1"
 deno_error = "0.7.0"
diff --git a/benches/source_hash_function.rs b/benches/source_hash_function.rs
index 1597791..cf5ad55 100644
--- a/benches/source_hash_function.rs
+++ b/benches/source_hash_function.rs
@@ -186,6 +186,7 @@ async fn build_eszip(mb: usize) -> EszipV2 {
     emit_options: EmitOptions::default(),
     relative_file_base: None,
     npm_packages: None,
+    npm_snapshot: Default::default(),
   })
   .unwrap()
 }
diff --git a/lib/lib.rs b/lib/lib.rs
index fbf9797..3b79bc1 100644
--- a/lib/lib.rs
+++ b/lib/lib.rs
@@ -343,6 +343,7 @@ pub async fn build_eszip(
     emit_options: Default::default(),
     relative_file_base: None,
     npm_packages: None,
+    npm_snapshot: Default::default(),
   })
   .map_err(|e| js_sys::Error::new(&e.to_string()))?;
   if let Some((import_map_specifier, import_map_content)) =
diff --git a/src/examples/builder.rs b/src/examples/builder.rs
index 11b7515..e81cd0a 100644
--- a/src/examples/builder.rs
+++ b/src/examples/builder.rs
@@ -81,6 +81,7 @@ async fn main() {
     emit_options: EmitOptions::default(),
     relative_file_base: None,
     npm_packages: None,
+    npm_snapshot: Default::default(),
   })
   .unwrap();
   if let Some((import_map_specifier, import_map_content)) =
diff --git a/src/v2.rs b/src/v2.rs
index 85fb7f2..aaf30db 100644
--- a/src/v2.rs
+++ b/src/v2.rs
@@ -27,7 +27,9 @@ use deno_npm::resolution::SerializedNpmResolutionSnapshotPackage;
 use deno_npm::resolution::ValidSerializedNpmResolutionSnapshot;
 use deno_semver::StackString;
 use deno_semver::npm::NpmPackageNvReference;
+use deno_semver::npm::NpmPackageReqReference;
 use deno_semver::package::PackageNv;
+use deno_semver::package::PackageNvReference;
 use deno_semver::package::PackageReq;
 use futures::future::poll_fn;
 use futures::io::AsyncReadExt;
@@ -346,6 +348,7 @@ pub struct FromGraphOptions<'a> {
   /// Note: When a path is above the base it will be left absolute.
   pub relative_file_base: Option<EszipRelativeFileBaseUrl<'a>>,
   pub npm_packages: Option<FromGraphNpmPackages>,
+  pub npm_snapshot: ValidSerializedNpmResolutionSnapshot,
 }
 
 /// Provide the source code of the Npm packages to include in the eszip
@@ -1069,16 +1072,6 @@ impl EszipV2 {
     modules.to_front(&specifier);
   }
 
-  /// Adds an npm resolution snapshot to the eszip.
-  pub fn add_npm_snapshot(
-    &mut self,
-    snapshot: ValidSerializedNpmResolutionSnapshot,
-  ) {
-    if !snapshot.as_serialized().packages.is_empty() {
-      self.npm_snapshot = Some(snapshot);
-    }
-  }
-
   /// Takes an npm resolution snapshot from the eszip.
   pub fn take_npm_snapshot(
     &mut self,
@@ -1361,6 +1354,7 @@ impl EszipV2 {
       visited: ToVisit,
       relative_file_base: Option<EszipRelativeFileBaseUrl>,
       npm_packages: Option<&mut FromGraphNpmPackages>,
+      npm_snapshot: &ValidSerializedNpmResolutionSnapshot,
     ) -> Result<
       Option<Box<dyn DoubleEndedIterator<Item = ToVisit<'a>> + 'a>>,
       anyhow::Error,
@@ -1489,16 +1483,26 @@ impl EszipV2 {
           modules.insert(specifier_key.into_owned(), eszip_module);
           Ok(None)
         }
-        deno_graph::Module::Npm(npm_module) => {
+        deno_graph::Module::Npm(_) => {
           let Some(npm_packages) = npm_packages else {
             return Ok(None);
           };
 
+          let req_ref =
+            NpmPackageReqReference::from_specifier(module.specifier())?;
+          let serialize_npm_snapshot = npm_snapshot.as_serialized();
+          let pkg_id = serialize_npm_snapshot.root_packages.get(req_ref.req())
+            .ok_or_else(|| anyhow::anyhow!("Could not resolve package req '{}' from graph because it was missing in the provided npm snapshot.", req_ref.req()))?;
+          let pkg_nv = &pkg_id.nv;
+          let pkg_nv_reference =
+            NpmPackageNvReference::new(PackageNvReference {
+              nv: pkg_nv.clone(),
+              sub_path: req_ref.sub_path().map(|s| s.into()),
+            });
+
           if visited.should_visit_package_meta() {
-            let meta_modules = npm_packages
-              .take_meta_modules(npm_module.nv_reference.nv().clone());
-            let package_jsons = npm_packages
-              .take_package_jsons(npm_module.nv_reference.nv().clone());
+            let meta_modules = npm_packages.take_meta_modules(pkg_nv.clone());
+            let package_jsons = npm_packages.take_package_jsons(pkg_nv.clone());
 
             for meta_module in
               meta_modules.into_iter().chain(package_jsons).flatten()
@@ -1513,15 +1517,14 @@ impl EszipV2 {
               );
             }
           } else if visited.should_visit_whole_package() {
-            let package =
-              npm_packages.take_package(npm_module.nv_reference.nv());
+            let package = npm_packages.take_package(pkg_nv);
             if let Some(mut package) = package {
               let modules_to_insert = package
                 .meta_modules
                 .into_iter()
                 .chain(package.package_jsons)
                 .flatten()
-                .chain(package.modules.shift_remove(&npm_module.nv_reference))
+                .chain(package.modules.shift_remove(&pkg_nv_reference))
                 .chain(package.modules.into_values());
               for module in modules_to_insert {
                 modules.insert(
@@ -1535,8 +1538,7 @@ impl EszipV2 {
               }
             }
           } else {
-            let module =
-              npm_packages.take_module(npm_module.nv_reference.clone());
+            let module = npm_packages.take_module(pkg_nv_reference);
             if let Some(module) = module {
               modules.insert(
                 module.specifier,
@@ -1590,6 +1592,7 @@ impl EszipV2 {
         module,
         opts.relative_file_base,
         npm_packages.as_mut(),
+        &opts.npm_snapshot,
       )?;
       if let Some(dependencies) = dependencies {
         let mut level_deps = Vec::new();
@@ -1636,7 +1639,7 @@ impl EszipV2 {
 
     Ok(Self {
       modules: EszipV2Modules(Arc::new(Mutex::new(modules))),
-      npm_snapshot: None,
+      npm_snapshot: Some(opts.npm_snapshot),
       options: Options::default(),
     })
   }
@@ -2203,6 +2206,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     let module = eszip.get_module("file:///external.ts").unwrap();
@@ -2238,6 +2242,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     let module = eszip.get_module("file:///main.ts").unwrap();
@@ -2284,6 +2289,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     let module = eszip.get_module("file:///json.ts").unwrap();
@@ -2329,6 +2335,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     let module = eszip.get_module("file:///wasm.ts").unwrap();
@@ -2393,6 +2400,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     let module = eszip.get_module("file:///dynamic.ts").unwrap();
@@ -2437,6 +2445,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     let module = eszip.get_module("file:///dynamic_data.ts").unwrap();
@@ -2492,6 +2501,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: Some((&base).into()),
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     let module = eszip.get_module("main.ts").unwrap();
@@ -2574,6 +2584,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: Some((&base).into()),
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     let module = eszip.get_module("main.ts").unwrap();
@@ -2734,6 +2745,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     eszip.add_import_map(ModuleKind::Json, specifier.to_string(), content);
@@ -2819,6 +2831,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     eszip.add_import_map(ModuleKind::Json, specifier.to_string(), content);
@@ -2894,6 +2907,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     eszip.add_import_map(ModuleKind::Jsonc, specifier.to_string(), content);
@@ -2977,6 +2991,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
     eszip.add_import_map(ModuleKind::Jsonc, specifier.to_string(), content);
@@ -3054,7 +3069,7 @@ mod tests {
     }
     .into_valid()
     .unwrap();
-    let mut eszip = super::EszipV2::from_graph(super::FromGraphOptions {
+    let eszip = super::EszipV2::from_graph(super::FromGraphOptions {
       graph,
       module_kind_resolver: Default::default(),
       parser: analyzer.as_capturing_parser(),
@@ -3062,13 +3077,9 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: original_snapshot.clone(),
     })
     .unwrap();
-    eszip.add_npm_snapshot(original_snapshot.clone());
-    let taken_snapshot = eszip.take_npm_snapshot();
-    assert!(taken_snapshot.is_some());
-    assert!(eszip.take_npm_snapshot().is_none());
-    eszip.add_npm_snapshot(taken_snapshot.unwrap());
     let bytes = eszip.into_bytes();
     insta::assert_debug_snapshot!(bytes);
     let cursor = Cursor::new(bytes);
@@ -3077,6 +3088,7 @@ mod tests {
         .await
         .unwrap();
     let snapshot = eszip.take_npm_snapshot().unwrap();
+    assert!(eszip.take_npm_snapshot().is_none());
     assert_eq!(snapshot.into_serialized(), {
       let mut original = original_snapshot.into_serialized();
       // this will be sorted for determinism
@@ -3183,7 +3195,7 @@ mod tests {
     }
     .into_valid()
     .unwrap();
-    let mut eszip = super::EszipV2::from_graph(super::FromGraphOptions {
+    let eszip = super::EszipV2::from_graph(super::FromGraphOptions {
       graph,
       module_kind_resolver: Default::default(),
       parser: analyzer.as_capturing_parser(),
@@ -3191,9 +3203,9 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: original_snapshot.clone(),
     })
     .unwrap();
-    eszip.add_npm_snapshot(original_snapshot.clone());
     let bytes = eszip.into_bytes();
     insta::assert_debug_snapshot!(bytes);
     let cursor = Cursor::new(bytes);
@@ -3275,6 +3287,20 @@ mod tests {
         ),
       ],
     );
+    let npm_snapshot = SerializedNpmResolutionSnapshot {
+      root_packages: root_pkgs(&[
+        ("a@1.2.2", "a@1.2.2"),
+        ("d@5.0.0", "d@5.0.0"),
+        ("other@99.99.99", "other@99.99.99"),
+      ]),
+      packages: Vec::from([
+        new_package("a@1.2.2", &[]),
+        new_package("d@5.0.0", &[]),
+        new_package("other@99.99.99", &[]),
+      ]),
+    }
+    .into_valid()
+    .unwrap();
     let eszip = super::EszipV2::from_graph(super::FromGraphOptions {
       graph,
       module_kind_resolver: Default::default(),
@@ -3283,6 +3309,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: Some(from_graph_npm_packages),
+      npm_snapshot,
     })
     .unwrap();
 
@@ -3420,6 +3447,22 @@ mod tests {
         ("z_0.1.2/foo", b"source code of z@0.1.2/foo".as_slice()),
       )],
     );
+    let npm_snapshot = SerializedNpmResolutionSnapshot {
+      root_packages: root_pkgs(&[
+        ("a@1.2.2", "a@1.2.2"),
+        ("d@5.0.0", "d@5.0.0"),
+        ("z@0.1.2", "z@0.1.2"),
+        ("other@99.99.99", "other@99.99.99"),
+      ]),
+      packages: Vec::from([
+        new_package("a@1.2.2", &[]),
+        new_package("d@5.0.0", &[]),
+        new_package("z@0.1.2", &[]),
+        new_package("other@99.99.99", &[]),
+      ]),
+    }
+    .into_valid()
+    .unwrap();
     let eszip = super::EszipV2::from_graph(super::FromGraphOptions {
       graph,
       module_kind_resolver: Default::default(),
@@ -3428,6 +3471,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: Some(from_graph_npm_packages),
+      npm_snapshot,
     })
     .unwrap();
 
@@ -3527,6 +3571,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: Some(from_graph_npm_packages),
+      npm_snapshot: Default::default(),
     })
     .unwrap();
 
@@ -3606,6 +3651,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: Some(from_graph_npm_packages),
+      npm_snapshot: Default::default(),
     })
     .unwrap();
 
@@ -3656,6 +3702,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap();
 
@@ -3964,6 +4011,7 @@ mod tests {
       emit_options: EmitOptions::default(),
       relative_file_base: None,
       npm_packages: None,
+      npm_snapshot: Default::default(),
     })
     .unwrap()
   }