diff --git a/pkgs/development/python-modules/langchain-aws/default.nix b/pkgs/development/python-modules/langchain-aws/default.nix
index d3f998ee2963..9d4e9699b622 100644
--- a/pkgs/development/python-modules/langchain-aws/default.nix
+++ b/pkgs/development/python-modules/langchain-aws/default.nix
@@ -53,6 +53,9 @@ buildPythonPackage rec {
   pythonRelaxDeps = [
     # Boto @ 1.35 has outstripped the version requirement
     "boto3"
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
   ];
 
   nativeCheckInputs = [
diff --git a/pkgs/development/python-modules/langchain-azure-dynamic-sessions/default.nix b/pkgs/development/python-modules/langchain-azure-dynamic-sessions/default.nix
index c507d23e3c62..1cdafa14137e 100644
--- a/pkgs/development/python-modules/langchain-azure-dynamic-sessions/default.nix
+++ b/pkgs/development/python-modules/langchain-azure-dynamic-sessions/default.nix
@@ -42,6 +42,12 @@ buildPythonPackage rec {
 
   build-system = [ poetry-core ];
 
+  pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
+  ];
+
   dependencies = [
     azure-identity
     langchain-core
diff --git a/pkgs/development/python-modules/langchain-chroma/default.nix b/pkgs/development/python-modules/langchain-chroma/default.nix
index 76c72230c089..0895fcb5ca17 100644
--- a/pkgs/development/python-modules/langchain-chroma/default.nix
+++ b/pkgs/development/python-modules/langchain-chroma/default.nix
@@ -30,7 +30,12 @@ buildPythonPackage rec {
 
   build-system = [ pdm-backend ];
 
-  pythonRelaxDeps = [ "numpy" ];
+  pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
+    "numpy"
+  ];
 
   dependencies = [
     chromadb
diff --git a/pkgs/development/python-modules/langchain-community/default.nix b/pkgs/development/python-modules/langchain-community/default.nix
index 3b598546128e..658051ffe119 100644
--- a/pkgs/development/python-modules/langchain-community/default.nix
+++ b/pkgs/development/python-modules/langchain-community/default.nix
@@ -57,7 +57,10 @@ buildPythonPackage rec {
   ];
 
   pythonRelaxDeps = [
-    "langchain" # Can fail during updates where building sees the old langchain
+    # Each component release requests the exact latest langchain and -core.
+    # That prevents us from updating individul components.
+    "langchain"
+    "langchain-core"
     "numpy"
     "pydantic-settings"
     "tenacity"
@@ -122,7 +125,7 @@ buildPythonPackage rec {
   passthru.updateScript = nix-update-script {
     extraArgs = [
       "--version-regex"
-      "^langchain-community==([0-9.]+)$"
+      "^langchain-community==(.*)"
     ];
   };
   # updates the wrong fetcher rev attribute
diff --git a/pkgs/development/python-modules/langchain-groq/default.nix b/pkgs/development/python-modules/langchain-groq/default.nix
index 5a62185b0f73..70e6b6cf1a3b 100644
--- a/pkgs/development/python-modules/langchain-groq/default.nix
+++ b/pkgs/development/python-modules/langchain-groq/default.nix
@@ -32,7 +32,11 @@ buildPythonPackage rec {
 
   build-system = [ pdm-backend ];
 
-  pythonRelaxDeps = [ "langchain-core" ];
+  pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
+  ];
 
   dependencies = [
     langchain-core
diff --git a/pkgs/development/python-modules/langchain-huggingface/default.nix b/pkgs/development/python-modules/langchain-huggingface/default.nix
index c88eb502085e..b935a8466edb 100644
--- a/pkgs/development/python-modules/langchain-huggingface/default.nix
+++ b/pkgs/development/python-modules/langchain-huggingface/default.nix
@@ -45,6 +45,12 @@ buildPythonPackage rec {
 
   build-system = [ poetry-core ];
 
+  pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
+  ];
+
   dependencies = [
     huggingface-hub
     langchain-core
diff --git a/pkgs/development/python-modules/langchain-mongodb/default.nix b/pkgs/development/python-modules/langchain-mongodb/default.nix
index a8356221aabe..9cf8fe7873a1 100644
--- a/pkgs/development/python-modules/langchain-mongodb/default.nix
+++ b/pkgs/development/python-modules/langchain-mongodb/default.nix
@@ -38,6 +38,9 @@ buildPythonPackage rec {
   build-system = [ poetry-core ];
 
   pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
     "numpy"
   ];
 
diff --git a/pkgs/development/python-modules/langchain-ollama/default.nix b/pkgs/development/python-modules/langchain-ollama/default.nix
index dca1132a9851..1b6036c5a254 100644
--- a/pkgs/development/python-modules/langchain-ollama/default.nix
+++ b/pkgs/development/python-modules/langchain-ollama/default.nix
@@ -35,6 +35,12 @@ buildPythonPackage rec {
 
   build-system = [ poetry-core ];
 
+  pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
+  ];
+
   dependencies = [
     langchain-core
     ollama
diff --git a/pkgs/development/python-modules/langchain-openai/default.nix b/pkgs/development/python-modules/langchain-openai/default.nix
index f126f6b4a87a..b3e50d9dd9ed 100644
--- a/pkgs/development/python-modules/langchain-openai/default.nix
+++ b/pkgs/development/python-modules/langchain-openai/default.nix
@@ -48,6 +48,12 @@ buildPythonPackage rec {
 
   build-system = [ pdm-backend ];
 
+  pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
+  ];
+
   dependencies = [
     langchain-core
     openai
diff --git a/pkgs/development/python-modules/langchain-tests/default.nix b/pkgs/development/python-modules/langchain-tests/default.nix
index dfb53f3a78aa..ce54f2ffdcef 100644
--- a/pkgs/development/python-modules/langchain-tests/default.nix
+++ b/pkgs/development/python-modules/langchain-tests/default.nix
@@ -38,6 +38,13 @@ buildPythonPackage rec {
 
   build-system = [ pdm-backend ];
 
+  pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
+    "numpy"
+  ];
+
   dependencies = [
     httpx
     langchain-core
diff --git a/pkgs/development/python-modules/langchain-text-splitters/default.nix b/pkgs/development/python-modules/langchain-text-splitters/default.nix
index cc9b83f69c13..b376a8d98885 100644
--- a/pkgs/development/python-modules/langchain-text-splitters/default.nix
+++ b/pkgs/development/python-modules/langchain-text-splitters/default.nix
@@ -32,6 +32,12 @@ buildPythonPackage rec {
 
   build-system = [ pdm-backend ];
 
+  pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
+  ];
+
   dependencies = [ langchain-core ];
 
   pythonImportsCheck = [ "langchain_text_splitters" ];
diff --git a/pkgs/development/python-modules/langchain/default.nix b/pkgs/development/python-modules/langchain/default.nix
index df273af85d92..9150b4dd98c9 100644
--- a/pkgs/development/python-modules/langchain/default.nix
+++ b/pkgs/development/python-modules/langchain/default.nix
@@ -63,6 +63,9 @@ buildPythonPackage rec {
   buildInputs = [ bash ];
 
   pythonRelaxDeps = [
+    # Each component release requests the exact latest core.
+    # That prevents us from updating individul components.
+    "langchain-core"
     "numpy"
     "tenacity"
   ];