diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 349624688f2..f70b677ac0c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -608,6 +608,9 @@ jobs:
               exit 1
           }
 
+      - name: Hydrate Unity SDK DLLs
+        run: cargo ci dlls
+
       - name: Check Unity meta files
         uses: DeNA/unity-meta-check@v3
         with:
@@ -630,10 +633,7 @@ jobs:
       - name: Patch com.clockworklabs.spacetimedbsdk dependency in manifest.json
         working-directory: demo/Blackholio/client-unity/Packages
         run: |
-          # Replace the com.clockworklabs.spacetimedbsdk dependency with the current branch.
-          # Note: Pointing to a local directory does not work, because our earlier steps nuke our meta files, which then causes Unity to not properly respect the DLLs (e.g.
-          # codegen does not work properly).
-          yq e -i '.dependencies["com.clockworklabs.spacetimedbsdk"] = "https://github.com/clockworklabs/SpacetimeDB.git?path=sdks/csharp#${{ github.head_ref }}"' manifest.json
+          yq e -i '.dependencies["com.clockworklabs.spacetimedbsdk"] = "file:../../../../sdks/csharp"' manifest.json
           cat manifest.json
 
       - uses: actions/cache@v3
diff --git a/sdks/csharp/.gitignore b/sdks/csharp/.gitignore
index 42502a20a58..249ecdec52d 100644
--- a/sdks/csharp/.gitignore
+++ b/sdks/csharp/.gitignore
@@ -76,3 +76,8 @@ obj~
 /nuget.config
 /nuget.config.meta
 .idea/
+
+# Hydrated SDK DLLs (produced by `cargo ci dlls`)
+/packages/
+/packages.meta
+!/packages/.gitignore
diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime.meta
deleted file mode 100644
index 6dc8b62571c..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime.meta
+++ /dev/null
@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: 8865417631feca343997ae22b3320e75
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0.meta
deleted file mode 100644
index a0714721e1a..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0.meta
+++ /dev/null
@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: ae5666f23a6d73c43b030a1b9ba5916b
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
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-  assetBundleVariant: 
diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers.meta
deleted file mode 100644
index aff342ea1f5..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers.meta
+++ /dev/null
@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: f112b25d371a72548b6b4959e104c4c3
-folderAsset: yes
-DefaultImporter:
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diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet.meta
deleted file mode 100644
index f2031f11a56..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet.meta
+++ /dev/null
@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: 8554a9e409be36a42bdb316f4677fabf
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs.meta
deleted file mode 100644
index a387186fa76..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs.meta
+++ /dev/null
@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: a24e03405bfe85e4996b2524189ac24a
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
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diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs/SpacetimeDB.BSATN.Codegen.dll b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs/SpacetimeDB.BSATN.Codegen.dll
deleted file mode 100755
index 1db1c1f2115..00000000000
Binary files a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs/SpacetimeDB.BSATN.Codegen.dll and /dev/null differ
diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs/SpacetimeDB.BSATN.Codegen.dll.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs/SpacetimeDB.BSATN.Codegen.dll.meta
deleted file mode 100644
index fcd3478e3fb..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/analyzers/dotnet/cs/SpacetimeDB.BSATN.Codegen.dll.meta
+++ /dev/null
@@ -1,71 +0,0 @@
-fileFormatVersion: 2
-guid: 31ff25d2b5723480e873b2b8f46bba86
-labels:
-- RoslynAnalyzer
-PluginImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  iconMap: {}
-  executionOrder: {}
-  defineConstraints: []
-  isPreloaded: 0
-  isOverridable: 1
-  isExplicitlyReferenced: 0
-  validateReferences: 1
-  platformData:
-  - first:
-      : Any
-    second:
-      enabled: 0
-      settings:
-        Exclude Editor: 1
-        Exclude Linux64: 1
-        Exclude OSXUniversal: 1
-        Exclude Win: 1
-        Exclude Win64: 1
-  - first:
-      Any: 
-    second:
-      enabled: 0
-      settings: {}
-  - first:
-      Editor: Editor
-    second:
-      enabled: 0
-      settings:
-        CPU: AnyCPU
-        DefaultValueInitialized: true
-        OS: AnyOS
-  - first:
-      Standalone: Linux64
-    second:
-      enabled: 0
-      settings:
-        CPU: None
-  - first:
-      Standalone: OSXUniversal
-    second:
-      enabled: 0
-      settings:
-        CPU: None
-  - first:
-      Standalone: Win
-    second:
-      enabled: 0
-      settings:
-        CPU: None
-  - first:
-      Standalone: Win64
-    second:
-      enabled: 0
-      settings:
-        CPU: None
-  - first:
-      Windows Store Apps: WindowsStoreApps
-    second:
-      enabled: 0
-      settings:
-        CPU: AnyCPU
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib.meta
deleted file mode 100644
index 3050ce8ab83..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib.meta
+++ /dev/null
@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: dc6d364d8264f4d43847a2f962630f96
-folderAsset: yes
-DefaultImporter:
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diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1.meta
deleted file mode 100644
index 56e591b6926..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1.meta
+++ /dev/null
@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: b964bd4b6540b3c4e90d73d46afd8fc2
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
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-  assetBundleVariant: 
diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1/SpacetimeDB.BSATN.Runtime.dll b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1/SpacetimeDB.BSATN.Runtime.dll
deleted file mode 100755
index b66c06e7b8a..00000000000
Binary files a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1/SpacetimeDB.BSATN.Runtime.dll and /dev/null differ
diff --git a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1/SpacetimeDB.BSATN.Runtime.dll.meta b/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1/SpacetimeDB.BSATN.Runtime.dll.meta
deleted file mode 100644
index de2769892f6..00000000000
--- a/sdks/csharp/packages/spacetimedb.bsatn.runtime/1.5.0/lib/netstandard2.1/SpacetimeDB.BSATN.Runtime.dll.meta
+++ /dev/null
@@ -1,33 +0,0 @@
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-PluginImporter:
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-      Any: 
-    second:
-      enabled: 1
-      settings: {}
-  - first:
-      Editor: Editor
-    second:
-      enabled: 0
-      settings:
-        DefaultValueInitialized: true
-  - first:
-      Windows Store Apps: WindowsStoreApps
-    second:
-      enabled: 0
-      settings:
-        CPU: AnyCPU
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: